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Table of Contents
2. TMT Pascal Language Description
2.2. Pascal Language Structure
2.2.9. Statements
2.2.9.6. If Statement
2.2.9.6. If Statement
The If statement conditionally executes one of two statements based on
the value of an expression. If statements take the following form:
if expression then statement [else statement]
where expression evaluates to a Boolean value. If expression
results in True then the statement following the reserved word then
is executed. Control is then transferred to the first statement
outside the if statement.
If expression evaluates to False and an else clause is
specified then the statement following else is executed.
If no else clause exists and expression is False then
the if statement is passed over. The following is an example of
an if statement.
if Flag then
WriteLn('Expression is True')
else
WriteLn('Expression is False');
The end of an if statement is indicated by a semicolon (;).
In the above example, if Flag is a constant then TMT Pascal
optimizes code generation and automatically eliminates code that is
never executed.
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