Print Numbers from 1 to N without using loop

Table of Contents

Problem
Using Recursion
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In this post, we will see how to print numbers from 1 to N without using loop.

Problem

Print number from 1 to N without using any loop.

N=10
Output: 1 2 3 4 5 6 7 8 9 10

Using Recursion

We can use tail recursion to solve this problem.

Base case
- When n <= 0, return
call printNumbers recursively with n-1
Print number while returning from recursion.

package org.arpit.java2blog;

public class PrintNumbersWithoutLoop {

public static void main(String[] args) {

PrintNumbersWithoutLoop pnwl=new PrintNumbersWithoutLoop();

pnwl.printNumbers(10);

}

public void printNumbers(int n)

{

if(n<=0)

{

return;

}

else

{

// Recursively call printNumbers

printNumbers(n-1);

// Print number while returning from recursion

System.out.print(" "+n);

}

Output

1 2 3 4 5 6 7 8 9 10

That’s all about how to print Numbers from 1 to N without using loop.

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Print Numbers from 1 to N without using loop

Problem