Shortening many if statements in a while loop in Java

Question

How can I shorten many subtractions of the exact same nature in a while loop in Java? I feel like it's very redundant and there can definitely be a shorter way.

while (x != 0) {
        if (x - 100 >= 0) {
            x -= 100;
        }

        if (x - 50 >= 0) {
            x -= 50;
        }

        if (x - 25 >= 0) {
            x -= 25;
        }

        ...

Answer 1

First of all, you don't need to subtract and compare to zero, instead just compare to the number you are subtracting.

while (x != 0) {
        if (x >= 100) {
            x -= 100;
        }

        if (x >= 50) {
            x -= 50;
        }

        if (x >= 25) {
            x -= 25;
        }

        ...

Secondly, what you're asking is a case by case problem. You could shorten the code above like this:

int[] nums = {100, 50, 25};

while (x != 0) {
    for (int num : nums) {
        if (x >= num) {
            x -= num;
        }
    }
}