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"
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"
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
javascript concat
const num1 = [2, 4, 5, 3, 8, 9, 11, 33, 44];
const num2 = [22, 33, 44, 55, 66, 77, 88];
const concatNumbers = num1.concat(num2)
console.log(concatNumbers)
//Expected output:
/*[
2, 4, 5, 3, 8, 9,
11, 33, 44, 22, 33, 44,
55, 66, 77, 88
]
*/
how to concatenate in javscript
var one = 'Hello';
var two = 'World';
console.log(one + two);
It will print: HelloWorld
console.log(one + ' ' + two);
It will print: Hello World
javascript concatenation
// the fastest way to string concat in cycle when number of string is less than 1e6
// see https://medium.com/@devchache/the-performance-of-javascript-string-concat-e52466ca2b3a
// see https://www.javaer101.com/en/article/2631962.html
function concat(arr) {
let str = '';
for (let i = 0; i < arr.length; i++) {
str += arr[i];
}
return str;
}
string concat in js
let string1 = "Hello"
let string2 = "World"
let finalString = string1 + ", " + string2 + "!" // Hello, World!
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