if condition then statement else statement
if condition
then statement else statement
if condition
then statement
else statement
if condition then
statementList
else statement
if condition then
statementList
else
statementList
end if
Condition yields true or false.
The if structure tests for the specified condition and, if the condition is true, executes the statement or series of statements that follow. If the condition is false and an else keyword is specified, the if structure executes the statement or series of statements that follow the else keyword instead.