Description

Exprif BASIC is a BASIC extension that is available on MSX Computer Magazine 46. You just need to enter RUN"EXPRIF" to install it.

It allows to use conditional expressions, just like in C language. It has the advantage to replace one or several lines with IF...GOTO...ELSE or IF...THEN...ELSE.

Besides, this extension allows to use assignments in expressions. In this case, you need to use LET, that can be forgotten in standard MSX-BASIC.

Examples

Example 1

10 IF A<10 THEN PRINT "Small" ELSE PRINT "Big"

becomes with Exprif BASIC

10 PRINT {A<10|"Small"|"Big"}

Example 2

10 IF B=0 THEN C=C+1 ELSE C=C*B

becomes with Exprif BASIC

10 C={B=0|C+1|C*B}

Example 3

10 A=0
20 A=A+1:IF A<100 THEN PRINT A:GOTO 20

becomes with Exprif BASIC

10 A=0
20 IF (LET A=A+1)<100 THEN PRINT A: GOTO 20

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