In this blog, we will learn how to add two variables in javascript. Generally, whenever we try to add two numbers in javascript using “+”, we get the result 2+2 = 22. while we expect 4.
So first we have to tell javascript that we want to add integer types value. For this, we can use parseInt().
The parseInt() function parses a string argument and returns an integer of the specified radix (the base in mathematical numeral systems).
var first_num = parseInt(10);
var second_num = parseInt(10);
alert(first_num + second_num );
// should now alert 20
or
var first_num = 10;
var second_num = 10;
var result = parseInt(first_num) + parseInt(second_num);
alert(result);
Add(concatenate) two strings in Javascript
If you want to concatenate two strings then you can try something like this.
var first_num = "hello";
var second_num = "codermen";
var result = first_num + " " +second_num;
alert(result);
// should now alert hello codermen
or
let text1 = "Hello";
let text2 = "world!";
let result = text1.concat(" ", text2);
// result should be "Hello world"

Brijpal Sharma is a web developer with a passion for writing tech tutorials. Learn JavaScript and other web development technology.