JAVASCRIPT

how to concatenate strings javascript

var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
// does not change the existing strings, but
// returns a new string containing the text
// of the joined strings.

string concatenation in js

var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
console.log(res);

string concat javascript

//This method adds two or more strings and returns a new single string.

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

js concat string

const str1 = 'Hello';
const str2 = 'World';

console.log(str1.concat(' ', str2));
// expected output: "Hello World"

console.log(str2.concat(', ', str1));
// expected output: "World, Hello"

concat js inside string

// using text literal
clssName={`d-block ${error ? "text-danger" : ""}`}

how to concatenate a string in javascript

let first_string = 'I am a programmer, ';
let second_string = 'I am indisposable.';
let what_i_said  = first_string + second_string;
console.log(what_i_said);

/* OR 
*/

let tell_my_boss = first_string.concat(second_string);
console.log(tell_my_boss);

js concat

let a = "foo";
let b = ["f", "o", "o"];

let c = a.concat("bar");           // "foobar"
let d = b.concat(["b", "a", "r"]); // ["f","o","o","b","a","r"]

js concatenate strings

const str1 = 'Hello';
const str2 = 'World';

console.log(str1 + str2);
>> HelloWorld

console.log(str1 + ' ' + str2);
>> Hello World

string javascript concatenation

    var dest = new String("");
    var src = new String("aze");
    var ar = new Array();
    ...
    ar.push(src);
    ar.push(src);
    ...
    dest = ar.join("");

string javascript concatenation

    var dest = new String("");
    var src = new String("aze");
    ...
    dest += src + src + src + src + src;

js concat

//ES6 spread operator same as arr1.concat(arr2)
var arr1 = ['1', '2', '3']
var arr2 = [4, 5, 6]
arr1 = [...arr1, arr2]   //... removes the [ and ] 
// leavin only an instance of inside.

output:
['1', '2', '3', 4, 5, 6 ]

string concat in js

let string1 = "Hello"
let string2 = "World"

let finalString = string1 + ", " + string2 + "!" // Hello, World!