This document discusses if and if-else statements in C++. It provides the syntax for if statements, which execute code if a test expression is true. If the expression is false, the code is skipped. It also covers if-else statements, which allow specifying different code blocks to execute depending on whether the test expression is true or false. Examples are given of programs using if and if-else statements to check if a user-input integer is positive or negative.

1. If else statement in c++
Submitted by :- Bishal Sharma
Submitted to :-Gitanjali Gupta

2. Contents:-
 Introduction to -If statement(syntax,working,example)
 Introduction to -If else statement(working,example)

3. If statement
(syntax):
if (testExpression)
{
// statements
}

4. How if statement works?

5. Sample of if program
#include <iostream>
using namespace std;
int main()
{
int number;
cout << "Enter an integer: ";
cin >> number;
if ( number > 0)
{
cout << "You entered a positive integer: " << number ;
}
return 0;
}

6. Syntax
if (testExpression1)
{
// statements to be executed if test expression1 is true ;
}
else
{
// statement to be execute if test expression is false;
}

7. C++ if...else working
The if else executes the codes inside the body of if statement,
if the test expression is true it skips the codes inside the body of else.
If expression is false it will skips code inside if and execute according to
Else statement.

8. C++ if...else working

9. Example
#include <iostream>
using namespace std;
int main()
{
int number;
cout << "Enter an integer: ";
cin >> number;
if ( number >= 0) {
cout << "You entered a positive integer: " << number << endl; }
else { cout << "You entered a negative integer: " << number << endl; }
return 0;
}

10.  Thank you