As we discuss about the Looping in the Previous section, Looping is a process which is used to execute a set of statements repetitively when a certain condition true.
Java provides three ways to execute the loops. While all of the ways offer similar basic functionality, but differ in syntax and condition. |
Do-While Loop:
Unlike for and while loops, which test the loop condition at the top of the loop, the do...while loop in Java programming checks its condition at the bottom of the loop.
A do...while loop is similar to a while loop, except the fact that it is guaranteed to execute at least one time. because do-while checks the test condition after the execution or exit of the loop body.
Syntax: Initialization do { Statements or Body of Loop; Increment/ Decrement; }while(Test condition); |
1.Initialization: We initialize the variable in use here. It marks the beginning of a for loop. It is possible to use an already declared variable, or to declare a variable, local to loop only.
2. Test Condition: It is used to test a loop's exit condition. They have to return a boolean value. It is also an Entry Control Loop, since the condition is checked before the loop statements are executed.
3. Execution of statements: Once the condition is evaluated to true, the statements are executed in the body of the loop.
4.Increment / Decrement: Used for next iteration to change the variable.
5. Loop termination: When the state is incorrect the loop stops signaling the end of its cycle of life.
Flow Chart of Do-While Loop :
