Control flow statements : looping : for

The for statement provides a compact way to iterate over a range of values.

Syntax

    for(initialization; condition; update){

        //statements to be executed

    }

for loop execute the statements until the condition evaluates to false.

Initialization section executed only once, at the starting of loop.

Condition section evaluated every time, before executing the loop statements

update section executes immediately after every execution of loop finishes.

Example : Printing numbers from 0 to 9

class ForEx{
 public static void main(String args[]){
  int var1;
  for(var1 = 0; var1 < 10; var1++){
   System.out.println(var1);
  }
 }
}

Output

0
1
2
3
4
5
6
7
8
9

Some points to remember

1. You can declare a variable inside the for loop itself

        for(int i=0; i<10; i++) is a valid construct

2. for( ; ; )

     Above for loop run for infinite times.

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