I'm sure this is quite a simple programming question however, I cant seem to understand it...
I'm trying to make the console.log print out numbers like this - 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 - one for each line. I thought modulo could be used to make this happen, however, I cant seem to figure out how to use it.
Here is the code:
iteration = 16;
for (var i = 0; i < iteration; i++) {
if(i == iteration%4 )
console.log(i);
}
Yes, you need a single loop.
No, you do not need the remainder operator %. This would give you
0 1 2 3 0 1 2 3 ...
But instead you could divide the actual value by 4 and take the integer value for console.log.
const iteration = 16;
for (let i = 0; i < iteration; i++) {
console.log(Math.floor(i / 4) + 1); // offset for starting with 1
}I suggest that you use two nested for loops, one for the rows and another one for the columns.
Here's an example of how i would do it:
const columns = 4;
const rows = 4;
//if you want to just console.log each number on a different line
for (let i = 1; i <= rows; i++) {
for (let j = 1; j <= columns; j++) {
console.log(i);
}
console.log("\n");
}
//if you want to add each number to an array, and then log the array
for (let i = 1; i <= rows; i++) {
let columnsArray = [];
columnsArray.length = columns;
columnsArray.fill(i);
console.log(columnsArray);
}
//if you want to just log the numbers, you can spread the array
for (let i = 1; i <= rows; i++) {
let columnsArray = [];
columnsArray.length = columns;
columnsArray.fill(i);
console.log(...columnsArray);
}
//or you could push the arrays in another one, and get a matrix!
const matrix = [];
for (let i = 1; i <= rows; i++) {
let columnsArray = [];
columnsArray.length = columns;
columnsArray.fill(i);
matrix.push(columnsArray);
}
console.log(matrix);
It was not clear the output that you wanted, so i got a little sidetracked and made an example for the different cases that came to my mind.
