Print Numbers from 1 to N

Problem Statement

Write a program to print all numbers from 1 to N, where N is a positive integer provided by the user.

This problem helps beginners understand:

Loops
User input
Basic number iteration

Explanation

To solve this problem:

Take an integer N as input.
Start a loop from 1.
Continue printing numbers until the loop reaches N.

If N = 5, the output will be:

Approach

Use a loop (for or while)
Initialize the loop with 1
End the loop at N
Print each number during iteration


#include <stdio.h>

int main() {
    int N;
    scanf("%d", &N);

    for(int i = 1; i <= N; i++) {
        printf("%d ", i);
    }
    return 0;
}


#include <iostream>
using namespace std;

int main() {
    int N;
    cin >> N;

    for(int i = 1; i <= N; i++) {
        cout << i << " ";
    }
    return 0;
}


import java.util.Scanner;

public class PrintNumbers {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        for (int i = 1; i <= N; i++) {
            System.out.print(i + " ");
        }
    }
}


N = int(input())

for i in range(1, N + 1):
    print(i, end=" ")

Input

Output


1 2 3 4 5

Time & Space Complexity

Time Complexity: O(N)
Space Complexity: O(1)

Constraints

1 ≤ N ≤ 10^5

🧠 Tips for Beginners

Use for loop when the number of iterations is known.
Always check loop conditions to avoid infinite loops.
Practice printing patterns using loops to strengthen logic.

Conclusion :

The Print Numbers from 1 to N problem is a great starting point for learning loops and control structures. Mastering this concept will help you solve more advanced problems involving iteration and logic building.

Keep practicing with EasyHaiCode 🚀
Happy Coding! 😊