Sometimes a programmer would like a statement, or group of statements to execute only if certain conditions are true.
There may be a different statement, or group of statements that are to be executed when the condition is false.
An expression that can be evaluated to true or false is called a Boolean expression. (Named after a mathematician named Boole.)
Examples of Boolean Expressions: (X and Y are variables)
|x == 5||(True if x has a value equal to 5)|
|x > y||(True if x is greater than y; example x is 7, Y is 3)|
|x < y||(True if x is less than y; example X is 2, y is 2.5)|
|x != y||(True if x is not equal to y; example x is 5, y is 6)|
|x >= y||(x is greater than or equal to y; example x is 4, y is 3 or 4)|
|x <= y||(x is less than or equal to y; example x is 4, y is 4 or 5)|