The OR operator returns true if both conditions are true

We use Double if we want to test more than 3 conditions

We use a LOOP to repeat a block of code

The if statement evaluates the condition inside the parentheses ( )

If the condition evaluates to true, the code inside the body of if is executed.

If the condition evaluates to false, the code inside the body of if is not skipped.

String is a collection of characters.

In programming, a variable is a container (storage area) to hold data.

To indicate the storage area, each variable should be given different names 

A variable name can only have alphabets, numbers, and the underscore 

A variable name can begin with a number.

In C++, the char keyword is used to declare character type variables. A character variable can store only a single character.

In C++, data types are declarations for variables. This determines the type and size of data associated with variables.