diff --git a/1.c b/1.c
new file mode 100644
index 0000000..bb44abf
--- /dev/null
+++ b/1.c
@@ -0,0 +1,35 @@
+// 1+3^3/3!+5^5/5!
+
+#include <stdio.h>
+
+int main(){
+	int num,i,factorial=1,power=1,j,n;
+	float sum=0;
+	
+	printf("Enter a number of the sum: ");
+	scanf("%d",&num);
+	
+	for(i=1;i<=2*num;i++){
+		//Since we have to get numeritor 
+		//not affected by the previous calculation so pro =1
+		if(i %2 ==0){
+			continue;
+			}
+			else{
+		power=1;
+		factorial=1;
+		//incase of factorial is get affected since the 
+		//facotial of number has not so facotial = 1 been used by previous calculation
+		for(j=1;j<=i;j++){
+			factorial =factorial*j;
+			power=power*i;
+		}
+	}
+
+		sum=sum+(power*1.0/factorial);
+		printf("%f\n",sum);
+	}
+
+	printf("the sum is: %f",sum);
+	return 0;
+}
diff --git a/12.c b/12.c
new file mode 100644
index 0000000..428c32a
--- /dev/null
+++ b/12.c
@@ -0,0 +1,31 @@
+
+
+//1/1!+2^2/2!+3^3/3!.....nth term.
+
+
+#include <stdio.h>
+
+int main(){
+	int num,i,factorial=1,power=1,j;
+	float sum=0;
+	
+	printf("Enter a number of the sum: ");
+	scanf("%d",&num);
+	
+	for(i=1;i<=num;i++){
+		//Since we have to get numeritor 
+		//not affected by the previous calculation so pro =1
+		power=1;
+		//incase of factorial it does not get affected since the 
+		//facotial of number has been used by previous calculation
+		factorial =factorial*i;
+		for(j=1;j<=i;j++){
+			power=power*i;
+		}
+		sum=sum+(power*1.0/factorial);
+		printf("%f\n",sum);
+	}
+	printf("the sum is: %f",sum);
+	return 0;
+}
+
diff --git a/TOH.c b/TOH.c
new file mode 100644
index 0000000..026e3ae
--- /dev/null
+++ b/TOH.c
@@ -0,0 +1,23 @@
+//wAP for table of hanoi.
+
+#include <stdio.h>
+
+int TOH(int, int, int, int);
+
+int main(){
+  int n,A=1,B=2,C=3;
+  printf("Enter a number of disc: ");
+  
+  scanf("%d",&n);
+  TOH(n, A,B,C);
+}
+
+int TOH(int n,int A,int B,int C){
+
+if(n > 0){
+   TOH (n-1,A,C,B);
+   printf("move a disk %d to %d\n",A,C);
+   TOH(n-1,B,A,C);
+}
+}
+
diff --git a/Untitled1.c b/Untitled1.c
new file mode 100644
index 0000000..16b6030
--- /dev/null
+++ b/Untitled1.c
@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <conio.h>
+
+int main(){
+	int num1,num2;
+	do{
+	printf("Enter a first number: ");
+	scanf("%d",&num1);
+	printf("Enter a secound number: ");
+	scanf("%d",&num2);
+	}
+	while(num1 >num2);
+	
+   for(num1;num1<=num2;num1++){
+   	if(num1 % 5 == 0){
+   		printf("%d is divisible by 5 \n",num1);
+	   }
+   }
+	return 0;
+}
diff --git a/Untitled2.c b/Untitled2.c
new file mode 100644
index 0000000..f05c5b0
--- /dev/null
+++ b/Untitled2.c
@@ -0,0 +1,25 @@
+//1/1!+2^2/2!+3^3/3!.....nth term.
+
+
+#include <stdio.h>
+
+int main(){
+	int num,i,factorial=1,power=1,j;
+	float sum=0;
+	
+	printf("Enter a number of the sum: ");
+	scanf("%d",&num);
+	
+	for(i=1;i<=num;i++){
+		power=1;
+		for(j=1;j<=i;j++)
+		factorial =factorial*i;
+			power=power*i;
+		
+		}
+		sum=sum+(power*1.0/factorial);
+		printf("%f\n",sum);
+	}
+	printf("the sum is: %f",sum);
+	return 0;
+}
diff --git a/Untitled3.c b/Untitled3.c
new file mode 100644
index 0000000..57cf327
--- /dev/null
+++ b/Untitled3.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <conio.h>
+
+int main(){
+	int num,i,count=0;
+	
+	printf("Enter a number: ");
+	scanf("%d",&num);
+	
+	for(num;num>=1;num--){
+		count = 0;
+	for(i=1;i<=num;i++){
+		if(num % i == 0)
+		{
+		 count++;
+		}
+	}
+	if(count == 2)
+	{
+	printf("\n %d is prime number",num);	
+	}
+}
+	return 0;
+}
diff --git a/fun10_SalaryRealated.c b/fun10_SalaryRealated.c
new file mode 100644
index 0000000..9f74e9b
--- /dev/null
+++ b/fun10_SalaryRealated.c
@@ -0,0 +1,28 @@
+/* WAP to input salary of a person and claculate travel allowence (10% of salary) 
+daily allowencce (12% of alsary) tax(15% of salary) also 
+calculate net salary of person */
+
+#include <stdio.h>
+
+int net_salary(int);
+
+//Name: Sumit Ojha
+
+int main() {
+   int salary;
+
+   printf("Enter the salary of the person: "); 
+   scanf("%d",& salary);
+   
+    printf("the net salary is : %d\n", net_salary(salary));
+return 0;
+}
+
+
+int net_salary(int i){
+    int tra, dai, tax;
+        tra = 10.0/100*i; 
+        dai = 12.0/100*i; 
+        tax = 15.0/100*i;
+return (dai+tra-tax);
+}
diff --git a/fun11_to_find_odd_n_even.c b/fun11_to_find_odd_n_even.c
new file mode 100644
index 0000000..517702e
--- /dev/null
+++ b/fun11_to_find_odd_n_even.c
@@ -0,0 +1,22 @@
+//WAP to find the odd and even number using conditions.
+
+#include <stdio.h>
+
+int num (int);
+int main() {
+    int n; 
+	printf("Enter a num: "); 
+	scanf("%d",&n); 
+	num(n); 
+return 0;
+}
+
+int num (int i){
+	if (i % 2 == 0){
+    printf("its even: %d", i);
+}
+ else{
+      printf("its odd: %d", i);
+    }
+return num;
+}
diff --git a/fun12_incrementdecrement.c b/fun12_incrementdecrement.c
new file mode 100644
index 0000000..7216507
--- /dev/null
+++ b/fun12_incrementdecrement.c
@@ -0,0 +1,26 @@
+//WAP to display the value of a and b or each Line 
+//a = ++ + ++a 
+//b = a-- - --a
+
+#include <stdio.h>
+
+// Name: Sumit Ojha
+
+int first(int); 
+int second(int,int);
+
+int main() {
+int a = 10 , b = 5;
+
+printf("++ + ++a = %d\n", first(a)); 
+printf("a-- - --b = %d\n", second(a,b)); 
+return 0;
+}
+
+int first (int i){
+return (i = + i + ++i);
+}
+
+int second(int i, int j) {
+return (j = i-- - --j);
+}
diff --git a/fun13_conv.c b/fun13_conv.c
new file mode 100644
index 0000000..e4c4b23
--- /dev/null
+++ b/fun13_conv.c
@@ -0,0 +1,39 @@
+/*WAP to input height in feet and inch, weight in kg, 
+convert height into inches and again convert into meters, now divide your weight by 
+square of your height in meters and finally assign o/p to variable constant factors
+*/
+
+#include <stdio.h>
+
+float inches (float, float); 
+float meter (float, float); 
+float ratio (float, float, float);
+
+int main() {
+   float feet1, inches1, weight1, meter1, ratio1; 
+   
+   printf("Enter the height in feet, inches and weight: "); 
+   scanf("%f %f %f",&feet1, &inches1,&weight1); 
+   
+   inches1 = inches (inches1, feet1); 
+   printf("the height in inches is: %f \n", inches1); 
+   
+   meter1=meter(meter1, inches1); 
+   printf("the inches in meter is: %f \n", meter1); 
+   
+   ratio1=ratio(ratio1, weight1, meter1); 
+   printf("the value of div of your weight sqr of height: %f \n", ratio1); 
+   return 0;
+}
+
+float inches (float i, float j){
+return (i = i+(j*12));
+}
+
+float meter(float i, float j){
+return (i = 0.254*j);
+}
+
+float ratio (float i ,float j , float k){
+return (i = j/(k*k));
+}
diff --git a/fun14_temp.c b/fun14_temp.c
new file mode 100644
index 0000000..965ade8
--- /dev/null
+++ b/fun14_temp.c
@@ -0,0 +1,30 @@
+/*WAP to read the tempr in farenheight and disply the message as follows nice day: temp >60 and and temp <80 , cold day: temp <=60 and hot day: tempr>=80. */
+
+#include <stdio.h>
+
+int tep(int);
+
+//Name: Sumit Ojha.
+
+int main(){
+   float temp;
+   
+   printf("Enter temp: "); 
+   scanf("%f",&temp); 
+   tep(temp);
+   
+ return 0;  
+}
+
+int tep(int i){
+    if (i > 60 && i < 80){
+    printf("it's a nice day."); 
+}
+ 	else if(i <= 60){
+    printf("it's a cold day.");
+}
+   else if (i >=80){
+   printf("it's a hot day.");
+}
+return tep;
+}
diff --git a/fun15_raterealted.c b/fun15_raterealted.c
new file mode 100644
index 0000000..5e77cbd
--- /dev/null
+++ b/fun15_raterealted.c
@@ -0,0 +1,54 @@
+/*An organization is dealing in two items say a and b provide the comission on the scale of there according to the following polocy. 
+commission rate for is 6% up to scale is 2000 if the scale of these according to following policy*/
+
+#include <stdio.h>
+
+float product(float, float);
+
+// Name: Sumit Ojnd
+
+int main(){
+   int a,b; 
+   product(a,b);
+return 0;
+}
+
+float product(float i, float j){
+    char product; 
+	float com_i_1, com_j_1, com_i_2, com_j_2;
+	
+    printf("Enter the product name: ");  
+	scanf("%c",&product);
+
+    if (product=='a'){
+    printf ("enter the price of a: "); 
+	scanf("%f",&i);
+	
+    if (i <= 2000){
+    com_i_1 = 6.0/100*i;  
+	printf("the comission on a is: %.2f",com_i_1);
+    }
+   
+   else if (i > 2000){
+   com_i_2 =(2000*6.0/100)+(i-2000)*7.0/100;  
+   printf("the comission on a is: %.2f \n", com_i_2);
+   }
+   }
+   
+   else if (product=='b'){
+         printf ("enter the price of b: "); 
+         scanf("%f",&j);
+         
+    if (j <= 4000)
+    {
+         com_j_1 = 10.0/100*j; 
+	     printf("the comission on b is: %.2f",com_j_1);
+    }
+    else if(j < 4000)
+    {
+	     com_j_2 = (4000*10.0/100)+(j-2000)*12.0/100; 
+	     printf("the comission on b is: %.2f \n", com_j_2);
+    }
+   }
+   return product;
+}
diff --git a/fun16_factorial.c b/fun16_factorial.c
new file mode 100644
index 0000000..53cb713
--- /dev/null
+++ b/fun16_factorial.c
@@ -0,0 +1,25 @@
+//WAP to do the factorail of the given number:
+
+
+#include <stdio.h>
+int factorial(int);
+
+int main(){
+    int n; 
+    
+	printf("Enter a number: "); 
+	scanf("%d",&n);
+    
+	printf("the facorial of nis : %d", factorial(n));
+	return 0;
+}
+
+int factorial(int a){
+	int fact; 
+	
+	if(a==1){
+    return a;
+}
+	fact = a*factorial(a-1); 
+	return fact;
+}
diff --git a/fun2_cal.c b/fun2_cal.c
new file mode 100644
index 0000000..ce25d23
--- /dev/null
+++ b/fun2_cal.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+
+/*
+Name: Sumit Ojha.
+*/
+
+//Funtion prototype.
+int sum(int, int);
+int sub(int, int);
+int di(int, int) ;
+int pro(int, int);
+int mod(int, int);
+
+//Funtion declaration.
+int main(){
+int a,b;
+
+printf("Enter two number: ");
+scanf("%d %d",&a,&b) ;
+
+printf("the sum is : %d\n",sum(a,b));
+printf("“the sub is : %d\n",sub(a,b));
+printf("the di is: %d\n",di(a,b));
+printf("the pro is: %d\n",pro(a,b));
+printf("the mod is: %d\n",mod(a,b));
+return 0;
+}
+
+
+//Funtion defination
+int sum(int i, int j){
+return (i+j);
+}
+
+int sub(int i,int j){
+return(i-j);
+}
+
+int di(int i,int j){
+return (i/5);
+}
+
+int pro(int i,int j){
+return (i*j);
+}
+
+int mod(int i, int j){
+return(i%j);
+}
+
+ 
+
diff --git a/fun3_SI.c b/fun3_SI.c
new file mode 100644
index 0000000..e0c9f81
--- /dev/null
+++ b/fun3_SI.c
@@ -0,0 +1,31 @@
+//WAP to find the simple intrest
+/*
+
+Name: Sumit Ojha
+
+*/
+
+#include <stdio.h>
+
+//prototype
+float si(float, float, float) ;
+
+//declaration
+int main(){
+float t,r,p;
+
+printf("Enter the value of P,T,R: ");
+scanf ("%f %f %f",&p,&t,&r);
+
+printf("the SI is: %.2f",si(p,t,r));
+
+return 0;
+}
+//defination
+float si(float i,float j, float k){
+float si;
+si = (i*j*k)/100;
+return(si);
+}
+
+
diff --git a/fun4_to_dis_the_val_of_char.c b/fun4_to_dis_the_val_of_char.c
new file mode 100644
index 0000000..36af4e1
--- /dev/null
+++ b/fun4_to_dis_the_val_of_char.c
@@ -0,0 +1,22 @@
+//WAP to to display the value of char.
+
+//Name: Sumit Ojha.
+
+#include <stdio.h> 
+
+//prototype 
+char ch(char);
+
+//declaration 
+int main(){
+char a;
+  printf("Enter a char: "); 
+  scanf("%c",&a); 
+  ch(a); 
+return 0;
+
+//defination 
+char ch(char i) {
+  printf("%c:%d",i,i); 
+return ch;
+}
diff --git a/fun5_cal_area_of_circle.c b/fun5_cal_area_of_circle.c
new file mode 100644
index 0000000..d740195
--- /dev/null
+++ b/fun5_cal_area_of_circle.c
@@ -0,0 +1,24 @@
+//WAP to calculate the area of cirlce:
+
+#include <stdio.h> 
+#define pi 3.14
+
+//prototype 
+float area(float);
+
+
+//declartion 
+int main(){
+    float r; 
+    printf("Enter the radious of the circle: "); 
+    scanf("%f",&r);
+    printf("the area of the circle is : %f", area(r));
+return 0;
+}
+
+//defination 
+float area(float i) {
+float area; 
+area = pi * i* i; 
+return area;
+}
diff --git a/fun6_to_cal_roots_of_a_quad_eqns.c b/fun6_to_cal_roots_of_a_quad_eqns.c
new file mode 100644
index 0000000..edd8475
--- /dev/null
+++ b/fun6_to_cal_roots_of_a_quad_eqns.c
@@ -0,0 +1,35 @@
+//WAP to calculate roots of a quad egn.
+
+/*
+Name: Sumit Ojha.
+*/
+
+#include <stdio.h> 
+#include <math.h>
+
+//funtion prototype 
+float ri (int , int ,int); 
+float r2 (int , int , int);
+
+//funtion calling 
+int main(){
+   int a,b,c;
+   
+    printf("Enter three numbers: "); 
+    scanf("%d %d %d",&a,&b,&c);
+   
+    printf("first root: %.2f \n", r1(a,b,c)); 
+	printf("Second root: %.2f \n", r2(a,b,c));
+	
+return 0;
+}
+
+//funtion defination 
+float r1(int i, int j, int k){  
+    return ((-j+pow((j*j-4*i*k), 0.5))/(2*i));  
+}
+
+
+float r2(int i, int j, int k){ 
+    return ((-j-pow((j*j-4*i*k), 0.5))/(2*i)); 
+} 
diff --git a/fun7_to_cal_the_vol_n_area_of_square.c b/fun7_to_cal_the_vol_n_area_of_square.c
new file mode 100644
index 0000000..8ee8b78
--- /dev/null
+++ b/fun7_to_cal_the_vol_n_area_of_square.c
@@ -0,0 +1,28 @@
+//WAP to calculate the volume and area of sphere
+
+/*
+Name: Sumit Ojha
+*/
+
+#include <stdio.h> 
+#define pi 3.14
+
+float vol (float); 
+float area (float);
+
+int main(){
+     float r; 
+     printf("Enter the value of radious: "); 
+     scanf("%f",&r); 
+     printf("the volume: %\n", vol(r)); 
+	 printf("the area: %f\n", area(r)); 
+	 return 0;
+}
+	 
+float vol (float i) {
+return(4.0/3*pi*i*i*i);
+}
+
+float area(float i) {
+return(4*pi*i*i);
+}
diff --git a/fun8relatedwithage.c b/fun8relatedwithage.c
new file mode 100644
index 0000000..fcd9c25
--- /dev/null
+++ b/fun8relatedwithage.c
@@ -0,0 +1,24 @@
+//WAP to read the age in year, month and days and convert it into number of days.
+
+#include <stdio.h>
+
+/*
+Name: Sumit Ojha 
+*/ 
+
+int days(int, int, int);
+
+int main(){
+int a,b,c;
+    printf("Enter the year, months, days: "); 
+	scanf("%d %d %d",&a,&b,&c);
+    printf("the total number of days are: %d", days(a,b,c)); 
+return 0;
+}
+
+	
+int days(int i, int j, int k){
+    int days; 
+    days = ((2022-i)*365)+(j*30)+k; 
+return days;
+}
diff --git a/fun9_relatedToDays.c b/fun9_relatedToDays.c
new file mode 100644
index 0000000..7c05fe9
--- /dev/null
+++ b/fun9_relatedToDays.c
@@ -0,0 +1,30 @@
+//WAP to rad the number of days and conver it into years and months.
+
+#include <stdio.h>
+
+int years_months(int);
+
+int main(){
+     int days;
+    
+	 printf("Enter number of days: "); 
+     scanf("%d",&days);
+    
+	 years_months(days); 
+	 return 0;
+}
+
+int years_months(int i){
+	int years, months, days, remaining_days; 
+	years =i/365; 
+	remaining_days =i % 365; 
+	months = remaining_days / 30; 
+	i= remaining_days % 30;
+    
+	printf("number of years: %d\n", years); 
+    printf("number of months: %d\n", months); 
+    printf("number of days: %d\n", i);
+    
+	 return years_months;
+}
+
diff --git a/sumofnth3.c b/sumofnth3.c
new file mode 100644
index 0000000..885a68a
--- /dev/null
+++ b/sumofnth3.c
@@ -0,0 +1,35 @@
+// 1+3^3/3!+5^5/5!......nth term
+
+#include <stdio.h>
+
+int main(){
+	int num,i,factorial=1,power=1,j,n;
+	float sum=0;
+	
+	printf("Enter a nth term to sind the sum of the number: ");
+	scanf("%d",&num);
+	
+	for(i=1;i<=2*num;i++){
+		//Since we have to get numeritor 
+		//not affected by the previous calculation so pro =1
+		if(i %2 ==0){
+			continue;
+			}
+			else{
+		power=1;
+		factorial=1;
+		//incase of factorial is get affected since the 
+		//facotial of number has not so facotial = 1 been used by previous calculation
+		for(j=1;j<=i;j++){
+			factorial =factorial*j;
+			power=power*i;
+		}
+	}
+
+		sum=sum+(power*1.0/factorial);
+		printf("%f\n",sum);
+	}
+
+	printf("the sum is: %f",sum);
+	return 0;
+}