If-then-else statements

• true alternative choice between sets of statements

Statement form

	statement_before;

	if test then
		statements(s)_1;
	else
		statements(s)_2;
	end if;

	statement_after;

An example program traces the development of a program that requires an if-then-else statement.

Statement semantics

Layout convention

• statements inside if indented by fixed amount
• statements inside begin - end indented by same