11-loops in java

• Hello guys today we are going to learn about loops in java language. There are 4 main types of loops in java language. Those are :
  • for loop
  • while loop
  • do while loop
  • for-each loop
• A loop statement allows us to execute a statement or group of statements multiple times.

• let see how the for loops work.

public class Testing {
    public static void main(String args[]){

        for(initializing; boolean expression; increment or decrement statement){
            loop body;
        }
    }
}

• Now lets try to print 1-100 numbers using java for loop.

public class Testing {
    public static void main(String args[]){

       for(int i=0;i<100;i++){
           System.out.println(i+1);
      }

 }
}

• lets try to write a code for print the even numbers from 1-100.

public class Testing {
    public static void main(String args[]){

        for(int i=1;i<100;i++){
            if(i%2==0){
                System.out.println(i);
            }
        }
    }
}

• Extreme for loop-loop without braces. Only line immediately after for does belongs to for loop.

public class Testing {
    public static void main(String args[]){

        for(int i=0;i<5;i++)
            System.out.println("hello");
        System.out.println("end of loop");
    }
}

• Nested for loop

public class Testing {
     public static void main(String args[]){

         for(int i=0;i<5;i++){
             System.out.println("Outer");
             for(int j=0;j<;5;j++){
                  System.out.println("Inner");
             }
         }
      }
}

• while loop-Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.

public class Testing {
    public static void main(String args[]){

        int x=0;
        while(x != 10){
            System.out.println(x);
            x++;
        }
    }
}

• do-while loop -Like a while statement, except that it tests the condition at the end of the loop body

public class Testing {
    public static void main(String args[]){

        int x=0;
        do{
            System.out.println(x);
            x++;
        }while(x!=10);
    }
}