write a c program to find positive or negative number.

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

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

#include <stdio.h>
int main()
{
    double number;

    printf("Enter a number: ");
    scanf("%lf", &number);

    // true if number is less than 0
    if (number < 0.0)
        printf("You entered a negative number.");

    // true if number is greater than 0
    else if ( number > 0.0)
        printf("You entered a positive number.");

    // if both test expression is evaluated to false
    else
        printf("You entered 0.");
    return 0;
}

Example 2: Check if a Number is Positive or Negative Using if...else
#include <stdio.h>
int main()
{
    double number;

    printf("Enter a number: ");
    scanf("%lf", &number);

    if (number <= 0.0)
    {
        if (number == 0.0)
            printf("You entered 0.");
        else
            printf("You entered a negative number.");
    }
    else
        printf("You entered a positive number.");
    return 0;
}

Example 3: Check if a Number is Positive or Negative Using if...else

#include<stdio.h>
int main(){
// found the negative number.
int n;
printf("enter the number:\n");

scanf("%d",&n);
if(n> 0){

    printf("the number is possitive:\n");

}
else if(n<0){
    printf("the number is negative:\n");

}

else if(n==0){
    printf("the number is zero:");
}


return 0;
}