IF Conditions

Muhammad Magdi

Triangle Type

You know that there are 3 types of triangles according to their sides.

You are given 3 integer numbers

(a, b, c) representing the lengths of the sides of a triangle.

Print the type of this triangle according to its sides.

Equilateral

Isosceles

Scalene

If Statements

if ( CONDITION ) {

TRUE-STATEMENTS

}

When the CONDITION is true, the TRUE-STATEMENTS inside the if-body are executed.

Relational Operators

Operator	Meaning
==	equal to
!=	not equal to
<	less than
>	greater than
<=	less than or equal
>=	greater that or equal

Example

#include <iostream>

using namespace std;

int main() {
  int num;
  cin >> num;
  if (num == 100) {
    cout << "It's a Hundred!" << endl;
  }
  cout << "Bye" << endl;
  return 0;
}

Notes

We used the '==' operator not the '=' operator.
This program prints the message "It's a Hundred!", Only when the input number is equal to 100.
This program prints the message "Bye", regardless the value of the input.

When the CONDITION is true, the TRUE-STATEMENTS inside the if-body are executed, otherwise the FALSE-STATEMENTS inside the else-body are executed.

if ( CONDITION ) {

TRUE-STATEMENTS

} else {

FALSE-STATEMENTS

}

if - else

if - else Example

#include <iostream>

using namespace std;

int main() {
  int x;
  cin >> x;
  if (x%2 == 0) {
    cout << "You entered an Even Number!" << endl;
  } else {
    cout << "You entered an Odd Number!" << endl;
  }
  return 0;
}

Assignment

Months:
January February March April May June July August September October November December

Thanks

Content

Motivation
If Statements - Syntax
Relational Operators
If ... else - Syntax
Assignment