Added JavaScript/reverseString.js

JavaScript/reverseString.js

@@ -0,0 +1,23 @@
+//           REVERSE STRING ALGORITHM
+//
+// Create a function that takes in a string (str) as an argument,
+// reverses it and returns the reversed string
+//
+// ----------------------------------------------------------------
+//
+// Test Cases:
+//
+// The string 'Hello World' passed as the argument to the function
+// returns a string.
+//
+// The string 'Hello World' passed as the argument to the function
+// returns 'dlroW olleH'
+//
+// ----------------------------------------------------------------
+
+function reverseString(str){
+    return str.split('').reverse().join('');
+}
+
+reverseString('Hello World')
+// returns 'dlroW olleH'

JavaScript/truncateString.js

@@ -0,0 +1,30 @@
+//           TRUNCATE STRING ALGORITHM
+//
+// Create a function that takes in a string (str) and a number (num)
+// as arguments, truncates the string (str) after (num) no. of characters,
+// adds an ellipsis(...) at the end and returns the truncated string.
+//
+// -------------------------------------------------------------------------
+//
+// Test Cases:
+//
+// The string 'Floccinaucinihilipilification' and the number 13 passed as
+// arguments to the function returns a string.
+//
+// The string 'Floccinaucinihilipilification' and the number 13 passed as
+// arguments to the function returns 'Floccinaucini...'
+//
+// The string 'Hello World' and the number 13 passed as
+// arguments to the function returns 'Hello World'
+//
+// -------------------------------------------------------------------------
+
+function truncateString(str, num){
+    console.log(str.length > num ? str.slice(0,num) + '...' : str)
+}
+
+truncateString('Floccinaucinihilipilification', 13)
+// returns 'Floccinaucini...'
+
+truncateString('Hello World', 13)
+// returns 'Hello World'