Counting Up

Say your loop is intended to run some code for every number from 1 to 100.

The general pattern for code like this is to have some variable which tracks the current number, a loop whose condition is that the number is less than the number you want to stop at, and a line at the bottom of the loop which increments the current number.

int currentNumber = 1;
while (currentNumber <= 100) {
    System.out.println(currentNumber);
    currentNumber++;
}

Take note that in this example the condition is currentNumber <= 100, so the code in the loop will run when currentNumber is equal to 100. If the condition was currentNumber < 100 it would stop at 99.

int currentNumber = 1;
// Stops at 99
while (currentNumber < 100) {
    System.out.println(currentNumber);
    currentNumber++;
}