Java Tutorial 21- Loops in Java - Study Viral

Java Tutorial 21- Loops in Java - Study Viral

Loops are also known as an iteration statements.

Loops are used to repeat some set of code again and again until some condition is true.

In Java there are FOUR type of loops.

1. —while loop
2. —do-while loop
3. —for loop
4. —Enhanced for loop

Loop Requirements

• Loop control variable
• Initialize the loop control variable
• Condition Check for loop
• Increment/Decrements

Syntax While Loop int a; // Loop Control Variable a = 0; // Initialize Variable while (a < 4) // Condition Check { System.out.println(“a :: ”+a); a++; // Increment }	Syntax do-while Loop int a; // Loop Control Variable a = 0; // Initialize Variable do{ System.out.println(“a :: ”+a); a++; //Increment } while (a < 4); // Condition Check
Syntax for Loop for( int i =0 ; i < 4 ; i++) { System.out.println(“a :: ”+a); }	Loop Control Variable Condition Output Increment int a = 0 a<4 or 0<4 [True] a :: 0 a++ (1) int a = 1 a<4 or 1<4 [True] a :: 1 a++ (2) int a = 2 a<4 or 2<4 [True] a :: 2 a++ (3) int a = 3 a<4 or 3<4 [True] a :: 3 a++ (4) int a = 4 a<4 or 4<4 [False] Loop Ended