While loop and do while loop

1. The while loop is to write the repeated actions in the code into a more concise and intuitive statement.

2. Do While is literally recycled first.

Similarities:

① It is a loop structure. "While (loop condition)" is used to indicate the loop condition and braces are used to enclose the loop operation.

Differences:

① The syntax is different. Compared with the while loop, The do while loop places the while keyword and the loop condition behind it, and adds a do keyword and a semicolon.

② The execution order is different. The while loop first judges and then executes; The do while loop first executes and then judges.

③ If the first loop condition is not met, the while loop will not be executed once, And the do while loop will be executed at least once no matter under any circumstances.

 

While loop and do while loop