✔ How To Use A Java Do-While Loop | (Video 27) смотреть онлайн

The Do-While Loop and While Loop are different because of their condition. A Do-While’s condition is located at the bottom of its loop. Therefore, the statement is executed at least once before determining if the condition is true or false. If the condition is true then the statement continues executing but will not continue if the condition is false.

Here’s a list of Java’s Loop Statements:
1. For Loop = https://tinyurl.com/Video-For-Loop
2. While Loop = https://tinyurl.com/Video-While-Loop
3. Do While Loop = https://tinyurl.com/Video-Do-While-Loop

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► Transcript
Let’s demo the Do-While Loop.

Write 2 print statements sysout “Start Do-While Loop“ and sysout “Stop Do-While Loop”.
Initialize the loop variable by writing int y = 0. Next write the keyword do which begins the syntax, CTRL + SPACE, and select the do-while statement. I’m going to add sysout “y = ” + y within the brackets then y ++ as the iteration so the loop can stop.

The while condition is written after the loop’s body. We want to execute the body while y is less than or equal to 20. The Do-While Loop will execute the print statement at least one time before checking if the condition is true or false. If the condition is false then the body execute one time. I’m going to make the condition false by changing the starting value from 0 to 100.

Here’s the breakdown. The do keyword starts the loop, executes the print statement by printing y = 100. It’s only supposed to execute while y is less than or equal to 20 so this statement will not execute anymore. Let’s run. We see the do-while loop start and execute y = 100 one time before stopping.

Change 100 back to 0 then Run. y starts at 0 and stops at 20.

We set the value to 0, started the loop by writing keyword do, added a print statement for execution, incremented the value by 1 then check for a condition while y is less than or equal to 20.

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