append string javascript code example
Example 1: string concatenation in js
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
console.log(res);
Example 2: string concat javascript
let str1 = new String( "This is string one" );
let str2 = new String( "This is string two" );
let str3 = str1.concat(str2.toString());
console.log("str1 + str2 : "+str3)
output:
str1 + str2 : This is string oneThis is string two
Example 3: javascript string concat vs +
It is strongly recommended to use the string
concatenationoperators (+, +=) instead of String.concat
method for perfomance reasons
Example 4: js concatenate strings
const str1 = 'Hello';
const str2 = 'World';
console.log(str1 + str2);
>> HelloWorld
console.log(str1 + ' ' + str2);
>> Hello World
Example 5: append string js
var s = "1"
s += "2"
Example 6: how the concat function works javascript
var arr = [1, 2, 3, 4];
var arr2 = [5, 6, 7, 8];
const both = arr.concat(arr2);
console.log(both);