Program to find the positive and negative number

Logic:

The number is positive

if number > 0

For example: 4 > 0 so 4 is a positive number

The number is negative

if number < 0

For example: -4 < 0 so -4 is a negative number

Flowchart of a positive-negative number

SFT (Shamil’s Flow Table )

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#include<iostream>
using namespace std;
int main()
{
int number;
cout<<"Enter any number"<<endl;
cin>>number;
if(number<0)
{
cout<<"Number is negative"<<endl;
}
else
{
cout<<"Number is positive"<<endl;
}
}

Output:

positive, negative number in c++

c-program-to-check-whether-a-number-is-positive-or-negative

Program with Comments:

#include<iostream>
//Adding the header file iostream
using namespace std;
//Adding the namespace
int main()
//Starting of integer type main function
{
//Starting of main function
int number;
//eclaration of integer type variable named as number. Variable number can have any value.
cout<<"Enter any number"<<endl;
//Display message.
cin>>number;
//User input the integer value and value is stored in variable number.
if(number<0)
//Value in variable number is checked by if condition. If the value of a number is less than 0, then the number is negative and control moves to the statement 9.But if the value of a number is greater than 0, then the number is positive and control moves to the statement 12.
{
//start of if body
cout<<"Number is negative"<<endl;
//Display the message that number is negative.
}
//ending of if
else
Control arrives at statement 12 if the condition is false at statement 8. 
{
cout<<"Number is positive"<<endl;
//Display message that number is positive.
}
//Ending of else.
}
//Ending of main function.