C Exercises: Check whether a number is positive or negative

Last update on December 20 2024 13:03:26 (UTC/GMT +8 hours)

Write a C program to check whether a given number is positive or negative.

Visual Presentation:

Sample Solution:

C Code:

#include <stdio.h>   // Include the standard input/output header file.

void main()
{
    int num;   // Declare an integer variable 'num'.

    printf("Input a number : ");   // Prompt the user to input a number.
    scanf("%d", &num);   // Read and store the user's input in 'num'.
    if (num >= 0)   // Check if 'num' is greater than or equal to 0.
        printf("%d is a positive number \n", num);   // Print a message indicating that 'num' is a positive number.
    else
        printf("%d is a negative number \n", num);   // Print a message indicating that 'num' is a negative number.
}

Sample Output:

Input a number :15                                                                                            
15 is a positive number  

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