Loops

In this problem, we will learn how to use for loop in Java with the help of examples and we will also learn about the working of Loop in computer programming.

In computer programming, loops are used to repeat a block of code. For example, if you want to show a message 100 times, then rather than typing the same code 100 times, you can use a loop.

Java for Loop

Java for loop is used to run a block of code for a certain number of times. The syntax of for loop is:

for (initialExpression; testExpression; updateExpression) {
    // body of the loop
}

Here,

• The initialExpression initializes and/or declares variables and executes only once.
• The condition is evaluated. If the condition is true, the body of the for loop is executed.
• The updateExpression updates the value of initialExpression.
• The condition is evaluated again. The process continues until the condition is false.

Example: Display numbers from 1 to 5

// Program to print numbers from 1 to 5

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

    int n = 5;
    // for loop  
    for (int i = 1; i <= n; ++i) {
      System.out.println(i);
    }
  }
}

Task:

Given an integer n as an input print the numbers from 1 to n in separate lines.

1 <= n <= 100

A single line of input containing an integer n.

Print all the numbers from 1 to n in separate lines.

Input 1:

 5

Output 1:

 1
 2
 3
 4
 5