How do you use AND OR NOT for masm

[setonai]

I'm trying to make a conditional statement for my input to only accept the values between 0-9,
Is it possible to use the OR  or AND, if so how would i apply it ?

i had a idea of using a bunch of compare but that would be too messy to go about

[dedndave]

if the ASCII input character is in AL...

Code Select Expand

        sub     al,30h
        cmp     al,9
        ja      not_numeric

or you can use XOR, instead

Code Select Expand

        xor     al,30h
        cmp     al,9
        ja      not_numeric

[BogdanOntanu]

or you could use high level constructs in order to make code more readable

Code Select Expand


.if al >= '0' && al <= '9'
  ; this is an numerical digit
.else
  ; this is not an numerical digit
.endif


logical AND is &&
logical OR is ||
logical NOT is !

This is similar to C programming language.