CS Awesome - Unit 3 Vocabulary

If Statements

Block of statements

One or more statements enclosed in an open curly brace '{' and a closing curly brace '}'.

Boolean expression

A mathematical or logical expression that is either true or false.

complex conditional

A Boolean expression with two or more conditions joined by a logical and '&&' or a logical or '||'.

conditional

Used to execute code only if a Boolean expression is true.

DeMorgan's Laws

Rules about how to distribute a negation on a complex conditional.

logical and

Used to only execute the following statement or block of statements if both conditions are true

logical or

Used to execute the following statement or block of statements if one of the conditions are true

negation

turns a true statement false and a false statement true

short circuit evaluation

The type of evaluation used for logical and '&&' and logical or '||' expressions. If the first condition is false in a complex conditional with a logical and the second condition won't be evaluated. If the first condition is true is a complex conditional with a logical or the second condition won't be evaluated.

if (Boolean expression)

used to start a conditional statement. This is followed by a statement or a block of statements that will be executed if the Boolean expression is true.

else

used to execute a statement or block of statements if the Boolean expression on the if part was false.

else if (Boolean expression)

used to have 3 or more possible outcomes such as if x is equal, x is greater than, or x is less than some value. It will only execute if the condition in the 'if' was false and the condition in the else if is true.