Create sum_of_digits.js

Author: BuildWithLal

algorithms/sum_of_digits.js

@@ -0,0 +1,21 @@
+/*
+
+    Given an integer, return the sum of all the individual digits in that integer
+    input: 4321
+    output: 4+3+2+1 = 10
+
+*/
+
+
+function sumDigit(n){
+    
+    if (n.toString().length <= 1) return n;
+    
+    return (n % 10) + sumDigit( Math.floor(n/10) );
+}
+
+
+sumDigit(4321);
+
+
+