AP Computer Science Unit 3 Vocab

Block of statement

Block of statement

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 owas 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