A while loop is similiar to a for loop but better suited for multiple loops. In a while loop, something inside the loop triggers the loop to stop.

Logical Operators: Operator Meaning ! Logical inverse && Logical AND == Logical OR != Inequality

There are two kinds of while loops: the standard while loop Example of a while loop The while loop repeats a statement or group of statements as long as a control expression is true. Unlike a for loop, a while loop doesn't use a counter variable. A while loop doesn't use a counter variable. The control expression in a while loop can be any valid expression.

the do while loop Example of a do-while loop The do while loop repeats a statement or group of statements as long as a control expression is true at the end of the loop. Because the control expression is tested at the end of the loop, a do while loop is executed at least one time.

A do while loop repeats the expression at the begining of the loop. The != symbol shows an inequality.