Multiple selections

Complex specifications may require a series of choices to be made between

Use a Multiple alternative if

Statement form

	statement_before

	if test_1 then
		statement(s)_1;
	elsif test_2 then
		statement(s)_2;
	else
		statement(s)_3;
	end if;

	statement_after

A multiple alternative if may often be summarised by a decision table listing the alternatives & when used

Balance after withdrawal Action

>=0 Accept withdrawal

>=-50 and < 0 Overdraft

<-50 Refuse withdrawal

An example program shows the use of multiple alternative if statements to process a withdrawal from a bank, according to the decision table above.

c-lokan@adfa.oz.au / 13 Feb 96