Loops in java (For loop , For each loop , While loop and Do while loop )

Loop can execute until they reached at specified condition

For Loop 

when we know how many times iteration required for the program we use for loop. For example we want to print a numbers from 1 to 10 in this condition we need ten iteration so for loop is better solution.

In for loop "for" is a keyword which contain three parts  initialize , terminate and increment.

Syntax:

for(initialize ; terminate ; increment){
//Block of code
}
for(int i=0 ; i< 10 ; i++){
}

Example 

 int i = 0;
    for(i=0 ; i< 10 ; i++){
        System.out.println(i);
    }

For each loop

For manipulating arrays we use for each loop

Syntax:

for (type variableName : arrayName) {
  // code block to be executed
}

Example

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
 for (String i : cars) {
 System.out.println(i);
}    

While Loop

While and do while loop uses when we are not confirmed how many iteration needed

Syntax:

while(condition){

//Block of code

}

Example

 int i = 0;
  while(i<9){
      System.out.println(i);
      i = i+1;
    }

Do-While

Syntax:

do{
 // Block of code
}(condition)

Example

Scanner obj = new Scanner(System.in);
    char cont;
     int i =0;
  do{
      System.out.println(i);
      i++;
      System.out.println("If you want to continue press y");
      cont= obj.next().charAt(0);
    }while(cont == 'y' || cont == 'Y' );