If and Then

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The if keyword precedes a condition, must be followed by then and a statement. The statement may optionally be followed by else and another statement.

If then

if condition
	then true_statement
else false_statement;

condition is a boolean expression that evaluates to true xor false. true_statement is executed if condition evaluates to true. false_statement is executed if condition evaluates to false. A compile-time error occurs if the type of condition does not evaluate to a boolean value.

Multiple statements in if then branch

If you need two or more statements for true_statement or false_statement, enclose them within a begin … end Block (compound statement).

if boolean_condition then
begin
	statement_zero;
	statement_one;
	statement_two;
end;

See also

• Official documentation: Reference guide: § “The If..then..else statement”
• IF, Tao Yue, Object Pascal Introduction
• If statement and semicolon
• case

Keywords: begin — do — else — end — for — if — repeat — then — until — while