Loops in Java

In programming languages is a feature which facilitates the execution of a set of instructions/functions repeatedly while some condition evaluates to true.

Typs of Loop.

There are 3 types of loops in Java that is......

for loop
while loop
do-while loop

For Loop

for is a keyword in Java programming language. for loop is used to repeat the execution of the statements until a certain condition holds.

Syntax:

for (initialization condition; testing condition; increment/decrement)
{
    statement(s)
} 
            

OR

            
 for (/* Initialization of variables */ ; /*Conditions to test*/ ; /* Increment(s) or decrement(s) of variables */) {
  // Statements to execute, i.e., Body of a for loop
}

Flow Chart :-

First step:- In for loop, initialization value first and only one time, which means that the initialization part of for loop only executes once.

Second step:-Condition in for loop is evaluated on each iteration, if the condition is true then the statements inside for loop body gets executed. Once the condition returns false, the statements in for loop does not execute and the control gets transferred to the next statement in the program after for loop.

Example 1 :- Table Print Program

  
public class ForEx {  
public static void main(String[] args) {  
    //Code of Java for loop  
    for(int i=1;i<=5;i++){  
        System.out.println(i);  
    }  
}  
}  

Output

Example 2 :- Table Print Program by the User input in java

  
 import java.util.Scanner;
 
  public class ForExampleTable {
 
  public static void main(String[] args) {
  Scanner in = new Scanner(System.in);
   
  System.out.print("Input a number: ");
  int num1 = in.nextInt();
   
  for (int i=0; i< 10; i++){
   System.out.println(num1 + " x " + (i+1) + " = " + 
     (num1 * (i+1)));
  }
 }
}

Output

Example 3 :- Print Multiplication table of any number in java use for loop.

 
import java.util.Scanner;

public class MultiplicationTablesEx
   {
   public static void main(String[] args) 
   {
      System.out.println("Please Enter an integer to print tables : ");
      Scanner sc = new Scanner(System.in);
      int number = sc.nextInt();
      System.out.println("Multiplication table of " + number + " is : ");
      for(int a = 1; a <= 10; ++a)
      {
         System.out.printf("%d * %d = %d \n", number, a, number * a);
      }
      sc.close();
   }
 }

Output

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Loops in Java

Typs of Loop.

For Loop

OR