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Factorial (loop)

JavaScript Loops

for with accumulation

Flowchart (ISO 5807)

StartInput nr = 1i = 2, n, 1r *= iReturn rEndFigure 1 — factorial

Source code

function factorial(n) {
    let r = 1;
    for (let i = 2; i <= n; i++) {
        r *= i;
    }
    return r;
}