JavaScript: Convert a string in abbreviated form

JavaScript String: Exercise-5 with Solution

Write a JavaScript function to convert a string in abbreviated form.

Pictorial Presentation:

JavaScript: Convert a string in abbreviated form

Test Data :
console.log(abbrev_name("Robin Singh"));
"Robin S."

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<meta charset="utf-8">
<title>Convert a string in abbreviated form</title>

JavaScript Code:

abbrev_name = function (str1) {
    var split_names = str1.trim().split(" ");
    if (split_names.length > 1) {
        return (split_names[0] + " " + split_names[1].charAt(0) + ".");
    return split_names[0];
console.log(abbrev_name("Robin Singh"));

Sample Output:

Robin S.


Flowchart: JavaScript- Convert a string in  abbreviated form

Live Demo:

See the Pen JavaScript Convert a string in abbreviated form - string-ex-5 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

var functionName = function() {} vs function functionName() {}

The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).

For example, a function expression:

// TypeError: functionOne is not a function

var functionOne = function() {

Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.

'use strict';    
{ // note this block!
  function functionThree() {
functionThree(); // ReferenceError

Ref: https://bit.ly/2zMAj1O