C Program to Check Whether a Number is Positive or Negative

C Program to Check Whether a Number is Positive or Negative

In this example, you will learn to check whether a number (entered by the user) is negative or positive.

This program takes a number from the user and checks whether that number is either positive or negative or zero.

Example #1: Check if a Number is Positive or Negative Using if...else

#include <stdio.h>
#include <conio.h>
int main()
{
    int number;
    printf("Enter a number: ");
    scanf("%d", &number);
    // true if number is less than 0
    if (number < 0)
        printf("You entered a negative number.");
    // true if number is greater than 0
    else if ( number > 0)
        printf("You entered a positive number.");
    // if both test expression is evaluated to false
    else
        printf("You entered 0");
    getch();
}
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Output 1

Enter a number: 12.3
You entered a positive number.

Output 2

Enter a number: 0
You entered 0.

Output 3

Enter a number: -5
You entered a negative number.

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