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Java While Loops

While loops are a type of repetitive flow that test a boolean expression to determine if the loop is to be repeated. Just as its name suggests you perform a loop “While” some condition is true. In Java, the syntax for a while loop is as follow.  
 

Syntax

int sentinelVariable = 0; // initialization

while (sentinelVariable < 5){ // condition
	System.out.println("While loop iteration #"+(sentinelVariable+1));
	sentinelVariable++; // incrementation
}

In every loop we have initialization, a condition and incrementation. In our program we initialize a sentinel variable (a variable that will be used in the condition). The condition is boolean and the code within the while code block runs in a continuous loop until that condition tests false. Incrementation is when the sentinel variable is incremented so as to prevent the loop from entering into an infinite loop.