3. (C) Write a program to check whether the number is positive, negative or zero.

3. (C) Write a program to check whether the number is positive, negative or zero.

1.

#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; }

2.

#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;
	}