Javascript print square using for loop and conditional statement only

Question

Just started my uni course, struggling a little with javascript. I have been asked to display a square using any character, however, the solution must combine for loops and if s

Answer 1

You could use nested for loops and take a line break after each filled line.

function print(s) { document.getElementById('out').innerHTML += s; }
function println(s) { document.getElementById('out').innerHTML += s + '\n'; }

var size = 5,
    i, j;

for (i = 0; i < size; i++) {
    for (j = 0; j < size; j++) {
        print("*");
    }
    println("");
}

Single loop with a check if i is unequal to zero and if the remainder is zero, then add a line break.

Using:

• === identity/strict equality operator checks the type and the value, for example if both are numbers and if the value is the same,

• !== non-identity/strict inequality operator it is like above, but it checks the oposite of it,

• % remainder operator, which returns a rest of a number which division returns an integer number.

• && logical AND operator, which check both sides and returns the last value if both a truthy (like any array, object, number not zero, a not empty string, true), or the first, if it is falsy (like undefined, null, 0, '' (empty string), false, the oposite of truthy).

function print(s) { document.getElementById('out').innerHTML += s; }
function println(s) { document.getElementById('out').innerHTML += s + '\n'; }

var size = 5,
    i;

for (i = 0; i < size * size; i++) {
    if (i !== 0 && i % size === 0) {
        println("");
    }
    print("*");
}