Print 1 - 15 in rows of 5

Print 1 - 15 in rows of 5.markdown

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A Pen by idrakimuhamad on CodePen.

License.

script.js

var a = [];
for (var i = 0; i < 5; i++) {
    if (i == 0) {
        a.push(i + 1);
    } else {
        for (var j = 0; j < i; j++) {
            if (j == 0) {
              a[j] += 1 + (i-1);
            } else {
              a[j] = a[j-1] + 1;
            }
        }
      a.push(a[i - 1] + 1);
    }
    console.log(a);
}

// 1
// 2 3
// 4 5 6
// 7 8 9 10
// 11 12 13 14 15