substring javascript
var str = "Hello world!";
var res = str.substring(1, 4); //ellsubstring javascript
var str = "Hello world!";
var res = str.substring(1, 4); //ellsubstring
const str = 'Mozilla';
console.log(str.substring(1, 3));
// expected output: "oz"
console.log(str.substring(2));
// expected output: "zilla"javascript select letter in string
const str = 'Hello';
str.substring(0, 2); // => 'Hel'Copyright © 2021 Codeinu
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