diff --git a/algorithms/maths/sum_of_digits.m b/algorithms/maths/sum_of_digits.m
new file mode 100644
index 0000000..0ae6359
--- /dev/null
+++ b/algorithms/maths/sum_of_digits.m
@@ -0,0 +1,15 @@
+%% Sum of digits
+
+function sum = sum_of_digits(number)
+%if someone input a negative no then it will make it positive
+if(number<0)    
+    number=(-1)*number;
+end %end of "if"
+sum=0;
+while(number>0)
+    sum=sum+rem(number,10);
+    number=fix(number/10);
+end     % end for "while"
+end     %end of 
+
+