C++ program to check whether a number is Positive or Negative or Zero

C++ program to check whether a number is Positive or Negative or Zero

In this tutorial, we will discuss a concept in C++  program to check whether a number is Positive or Negative or Zero

In this post, we will learn how to check if the number is positive or negative or zero in C++ programming language

 

Logic of the program

If a number is greater than zero it is a positive number – (if the number>=0)

If a number is less than to zero it is a Negative number – (if the number<=0)

Otherwise, if the number is equal to zero the number is zero – (if the number==0)

C++ program to check a number is Positive or Negative or Zero

Using if else if statements

Program 1

This program allows the user to enter a number and check if the number is positive or negative or zero using if-else if statements

#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
    int num1;
    cout << "Enter the number" << endl;
    cin>>num1;
    if(num1>0){
    cout<<num1<<" is a positive number";
}
else if(num1<0){
    cout<<num1<<" is a Negative number";
}
else{
    cout<<"You entered Zero";
}
getch();
    return 0;
}

When the above code is executed, it produces the following results

case 1

Enter the number
12
12 is a positive number

 

case 2

Enter the number
-12
-12 is a negative number

 

case 3

Enter the number
0
you entered zero

 

Using Nested if statements

Program 2

This program allows the user to enter a number and check if the number is positive or negative or zero using Nested if statements

#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
    int num1;
    cout << "Enter the number" << endl;
    cin>>num1;
    if(num1<=0){

    if(num1==0){
    cout <<" you entered zero";
    }
     else{
    cout <<num1<<" is a Negative number";
    }
}
else{
    cout <<num1<<" is a positive number";
}
getch();
    return 0;
}

When the above code is executed, it produces the following results

case 1

Enter the number
12
12 is a Positive number

case 2

Enter the number
-12
-12 is a negative number

case 3

Enter the number
0
you entered 0

 

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