Write C program to check whether a number is positive, negative or zero using Macros

This is a C++ Program to Check if a Number is Positive or Negative.

The program takes a number and checks if it is a positive number or negative number.

1. The program takes a number. 2. It is checked if it is positive or negative. 3. The result is printed.

4. Exit.

Here is the source code of C++ Program to Check if a Number is Positive or Negative. The program output is shown below.

#include<iostream>
using namespace std;
int main ()
{
int num;
cout << "Enter the number to be checked : ";
cin >> num;
if (num >= 0)
cout << num << " is a positive number.";
else
cout << num << " is a negative number.";
return 0;
}

1. The user is asked to enter a number and it is stored in the variable ‘num’. 2. If num is greater than or equal to 0, it is positive. 3. Else it is a negative number.

4. The result is then printed.

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Case 1 : Enter the number to be checked : -8 -8 is a negative number. Case 2 : Enter the number to be checked : 0 0 is a positive number. Case 2 : Enter the number to be checked : 125 125 is a positive number.

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

Check Positive or Negative Using Nested if...else

#include <stdio.h> int main() { double num; printf("Enter a number: "); scanf("%lf", &num); if (num <= 0.0) { if (num == 0.0) printf("You entered 0."); else printf("You entered a negative number."); } else printf("You entered a positive number."); return 0; }

You can also solve this problem using nested if...else statement.

Check Positive or Negative Using if...else Ladder

#include <stdio.h> int main() { double num; printf("Enter a number: "); scanf("%lf", &num); if (num < 0.0) printf("You entered a negative number."); else if (num > 0.0) printf("You entered a positive number."); else printf("You entered 0."); return 0; }

Output 1

Enter a number: 12.3 You entered a positive number.

Output 2

Enter a number: 0 You entered 0.

Given a number A. The task is to check whether A is positive, negative or zero.

Examples:

Input: A = 2 Output: 2 is positive Input: A = -554 Output: -554 is negative

In the below program, to find whether A is positive, negative or zero; first the number is taken as input from the user using scanf in

, and then A is checked for positive using

statement and

and

operators. Below is the C program to find whether a number is positive, negative or zero.

printf("Enter the number A: ");

printf("%d is positive.", A);

printf("%d is negative.", A);

printf("%d is zero.", A);

Output:

Enter the number A =: -54 -54 is negative.

Time Complexity: O(1)

Auxiliary Space: O(1)

Article Tags :

Last update on August 19 2022 21:50:43 (UTC/GMT +8 hours)

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

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h> void main() { int num; printf("Input a number :"); scanf("%d", &num); if (num >= 0) printf("%d is a positive number \n", num); else printf("%d is a negative number \n", num); }

Sample Output:

Input a number :15 15 is a positive number

Flowchart:

C Programming Code Editor:

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#include <unistd.h> #include <stdio.h> #include <limits.h> int main() { char cwd[PATH_MAX]; if (getcwd(cwd, sizeof(cwd)) != NULL) { printf("Current working dir: %s\n", cwd); } else { perror("getcwd() error"); return 1; } return 0; }

Ref : https://bit.ly/3jSypjr