Key Concepts

Review core concepts you need to learn to master this subject

Loops identify divisble integers

Loops compute sums

Loops identify digits in a number

Loops determine a minimum or maximum value.

Loops determine the frequency with which a specific criterion is met

Loops can determine if at least one element has a particular property

Loops can determine if all elements have a particular property

Loops can determine the presence or absence of duplicate elements

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Loops identify divisble integers

int divisor = someNumber;
int dividend = anotherNumber;

while (dividend >= divisor) {
  dividend -= divisor;
}

if (dividend == 0) {
  // then the dividend is divisible by the divisor
}

Loops can be used to identify if an integer is or is not evenly divisible by another integer. By the end of the loop, if the dividend is 0, then we know that there are no leftovers and it is evenly divisible by the divisor.