Xbasic

IF ... THEN ... ELSE, ELSEIF

Syntax

IF Logical_Expression1 [ THEN ] [ Statements1 ] [ ELSEIF Logical_Expression2 [ THEN ] [ Statements2 ]] ... [ ELSEIF Logical_ExpressionN [ THEN ] [ StatementsN ]] [ ELSE [ Statements ]] END IF

Arguments

Logical_Expression1

An expression that evaluates to .T. (TRUE) or .F. (FALSE).

Logical_Expression2 ... Logical_ExpressionN

Optional. Expressions that evaluates to .T. (TRUE) or .F. (FALSE).

Description

Executes the statements for the first logical expression that evaluates to TRUE.

Discussion

IF ... THEN ... ELSE is a conditional control structure, executing the statements for the first logical expression that evaluates to TRUE. If no expression evaluates to TRUE, statements supplied after the else clause are executed. IMPORTANT: The then and else clauses must be the last words on the line. SELECT ... CASE, IIF(), CASE()

Associate a grade with a score. Any score below 60 is an F.

FUNCTION test_grade as C(score as N)
    if score >= 90 then
        grade = "A"
    elseif score >= 80 then
        grade = "B"
    elseif score >= 70 then
        grade = "C"
    elseif score >= 60 then
        grade = "D"
    else
        grade = "F"
    end if
    test_grade = grade
end FUNCTION

ENDIF command 

The ENDIF keyword can be used interchangeably with the END IF command.

See Also