diff --git a/students/aryal/ex1.js b/students/aryal/ex1.js
new file mode 100644
index 0000000..1c7fc89
--- /dev/null
+++ b/students/aryal/ex1.js
@@ -0,0 +1,9 @@
+/*
+Write a JavaScript function to check whether an input is an array or not.
+
+Test Data :
+console.log(isArray('w3resource')); // false
+console.log(isArray([1, 2, 4, 0])); // true
+*/
+
+
diff --git a/students/aryal/ex2.js b/students/aryal/ex2.js
new file mode 100644
index 0000000..bc61230
--- /dev/null
+++ b/students/aryal/ex2.js
@@ -0,0 +1,32 @@
+/* 
+Write a JavaScript function to get the first element of an array. Passing a parameter 'n' will return the first 'n' elements of the array.
+
+Test Data : 
+console.log(first([7, 9, 0, -2])); // 7
+console.log(first([],3)); // []
+console.log(first([7, 9, 0, -2],3)); // [7,9,0]
+console.log(first([7, 9, 0, -2],6)); // [7, 9, 0, -2]
+console.log(first([7, 9, 0, -2],-3)); // [] 
+
+*/
+function get_the_value(array, n) {
+    if(array === null){
+        return 0;
+    }
+    else if (n === null){
+        return [0];
+    }
+    else if  (n < 0){
+        return [];
+    }
+    else {
+        return array.slice(0, n);
+    }
+}
+    
+console.log(get_the_value([7, 90, 7]));
+console.log(get_the_value([2,8,7,8,9],2))
+
+
+
+
diff --git a/students/aryal/ex3.js b/students/aryal/ex3.js
new file mode 100644
index 0000000..ff3be1a
--- /dev/null
+++ b/students/aryal/ex3.js
@@ -0,0 +1,23 @@
+/*
+Write a simple JavaScript program to join all elements of the following array into a string.
+
+Sample array : 
+var myText = ['This', 'is', 'not', 'working'];
+joinArray(myText);
+
+Expected Output : 
+This is not working
+ */
+
+function joinArray(input){
+    var index = 0,
+     result = ' ';
+    while (index<input.lenght){
+        result = result+' ' +input[index];
+        index++;
+
+    }
+
+    return result;
+}
+ console.log(joinArray(['Nabin','Aryal']))
\ No newline at end of file
diff --git a/students/aryal/ex4.js b/students/aryal/ex4.js
new file mode 100644
index 0000000..e69de29
diff --git a/students/copy-and-rename/ex1.js b/students/copy-and-rename/ex1.js
index 1c7fc89..6f9e107 100644
--- a/students/copy-and-rename/ex1.js
+++ b/students/copy-and-rename/ex1.js
@@ -7,3 +7,8 @@ console.log(isArray([1, 2, 4, 0])); // true
 */
 
 
+function isArray(input){
+
+
+          Array.isArray(input)
+
diff --git a/students/copy-and-rename/ex4.js b/students/copy-and-rename/ex4.js
index 72f98cc..0d2148c 100644
--- a/students/copy-and-rename/ex4.js
+++ b/students/copy-and-rename/ex4.js
@@ -6,4 +6,14 @@ validatePIN(00004324); // false
 validatePIN('2312'); // true
 validatePin('asd123'); // false
 validatePin('000010'); // true
- */
\ No newline at end of file
+ */
+
+ function validatePIN(input){
+     if (typeof(input)) !=='string'){
+         return false;
+     }
+     else if input[0]===0{
+         return false;
+     }
+     else if 
+ }
\ No newline at end of file