Logical Operators and Expressions

• C++ has the equivalent mathematical logic operators AND, OR, and NOT, represented by &&, ||, and !
• Used to express multiple conditions in one statement

For example, in algebra we may write:

0 < x < 20

to show that x is between 0 and 20, inclusive. In C++ we would write it:

0 <= x && x <= 20

or

x >= 0 && x <= 20

Truth table for logical expressions:

x	y	x && y	x || y	!x
TRUE	TRUE	TRUE	TRUE	FALSE
TRUE	FALSE	FALSE	TRUE	FALSE
FALSE	TRUE	FALSE	TRUE	TRUE
FALSE	FALSE	FALSE	FALSE	TRUE

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