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if Signals the Start of an IF/THEN/ELSE Statement
if <bool exp> then
<statement>;
if <bool exp> then
<statement1>
else
<statement2>;
If <bool exp> yields a value of TRUE, then <statement> is executed. In
the IF/THEN/ELSE form, if <bool exp> is TRUE, then <statement1> is
executed; otherwise, <statement2> is executed. Note that these are
single statements; if you want multiple statements, you must use a
compound statement instead, such as:
if <bool exp> then begin
<statement>;
...;
<statement>
end;
<bool exp> A Boolean expression yielding a value of TRUE or
FALSE.
<statement>,
<statement1>
<statement2> Any legal statement, including a compound statement.
-------------------------------- Example ---------------------------------
if B = 0
then Writeln('Ratio is undefined')
else Writeln('Ratio is ',A/B);
See Also:
then
else
begin
end
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