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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