C Program to check whether a given integer is positive or negative

In this article, we will write a C Program to check whether a given integer is positive or negative. For example, if user enters -5 then program should print that it’s a negative number.

C Program to check if an integer is positive or negative

In the following program, we are using if-else statement. If the input number is greater than zero then its a positive number else it is a negative number. If the number is zero then it is neither positive nor negative.

#include <stdio.h>
 
void main()
{
    int num;
 
    // Prompt user to enter an integer number
    printf("Enter an integer number: \n");
    scanf("%d", &num);
    
    // Check if the number is positive, negative, or zero
    if (num > 0)
        printf("%d is a positive number \n", num);
    else if (num < 0)
        printf("%d is a negative number \n", num);
    else
        printf("0 is neither positive nor negative");

    return 0;
}

Output:

Output 1:

Enter an integer number:
0
0 is neither positive nor negative

Output 2:

Enter an integer number:
-3
-3 is a negative number

Output 3:

Enter an integer number:
100
100 is a positive number

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