C PROGRAMMING PROGRAM • LOOPS & NUMBER PROBLEMS

Print Numbers from N to 1

Learn how to print numbers from n to 1 using a clear C program.

Beginnerfor loopDecrementReverse sequence

PROBLEM UNDERSTANDING

Input and expected output

Sample input

Sample output

5 4 3 2 1

COMPLETE C PROGRAM

Complete C implementation

#include <stdio.h>

int main(void)
{
    int limit;

    printf("Enter N: ");
    scanf("%d", &limit);
    for (int number = limit; number >= 1; number--)
        printf("%d%c", number, number == 1 ? '\n' : ' ');
    return 0;
}

CURRENT STEP

Select Start to walk through the important lines.

SELECTED LINE

No line selected

EXPECTED OUTPUT FOR THE SAMPLE

5 4 3 2 1

0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Initialize the counter at N and decrement it until 1.
Display the computed result.

Initialize the counter at N and decrement it until 1.

EFFICIENCY

Time and space complexity

Time complexity

O(n)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

Check this

Use the correct format specifier for every variable.

Check this

Initialize variables before using their values.

Check this

Check braces, semicolons and input order carefully.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.