how to get number triple using looping for.

getNumberTriple.js

/**
 * Risyandi - 2021
 * how to create increment to triple number.
 * first we have value from  looping with initial duplicate 3.
 * and the expected result like this :
 * 111 222 333
 * 111 222 333
 * 111 222 333
 * 444 555 666
 * 444 555 666
 * 444 555 666
 * 777 888 999
 * 777 888 999
 * 777 888 999 
 */

function getNumberTriple(value) {
    let result = '';
    let duplicate = 3;
    for (let indexX = 0; indexX < duplicate; indexX++) {
        let number = (indexX * 3);
        for (let indexY = 0; indexY < duplicate; indexY++) {
            for (let indexZ = 1; indexZ <= duplicate; indexZ++) {
                let resNumber = (number + indexZ);
                result += resNumber + ' ' + resNumber + ' ' + resNumber;
            }
        }
    }
    console.log(result);
    return result;
}

getNumberTriple();