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Introduction to Java

LoopsLoops

Java loops repeat a block of code until a certain condition is met.

The while loop

Syntax of the while loop:

The code inside the while loop will be executed as long as the condition is true. Once the condition becomes False, the code inside the loop will stop executing, and the program will continue with the following line of code after the loop. It is important to note that the condition is checked before the code inside the loop is executed.

Example for the while loop:

java

Main.java

The do-while loop

The do-while loop is a control flow statement that allows code to be executed repeatedly based on a given condition.

Syntax of the do-while loop:

The code block in a do-while loop will execute first, and then the condition will be checked. If the condition evaluates to True, the code block will execute again. If the condition is False, the code block will never be executed.

Difference between the do-while loop and the while loop

A do-while loop allows code to be executed repeatedly based on a given condition. The condition is evaluated after the code block is executed, and the while loop checks the condition before the code block is executed. If the condition is False, the code block will never be executed.

Example of the do-while loop:

java

Main.java

The for loop

A for loop is a type of loop that helps you to execute a given set of commands multiple times. The number of times the commands repeat depends on the number you use as the parameter for the for loop.

Syntax of the for loop:

Here, the initialization expression is executed only once. The condition is evaluated before each iteration. If the condition evaluates to True, the code inside the for loop is executed. After the code inside the for loop is executed, the increment expression is executed. The for loop can have an optional label that you can use to break or continue the loop.

The advantage of the for loop is that it can help you save time by automatically running a set of commands.

Example for the for loop:

java

Main.java

Infinite loop

An infinite loop is an instruction sequence that loops endlessly when a terminating condition isn't met.

java

Main.java

question-icon

Java will run the above loop for ___ times.

Select the correct answer

Section 1.

Chapter 8