NOT condition in PBASIC?

Technical Programming
1

In C++ there is a condition, AND NOT which uses the syntax “!”.
An example of this is: variable!=2

is there any ! command in PBASIC? If not, what syntax would I use to say “IF lightSensor1 DOES NOT EQUAL 1 THEN…”

thanks

2

*Originally posted by CHSguard72 *
**In C++ there is a condition, AND NOT which uses the syntax “!”.
An example of this is: variable!=2

is there any ! command in PBASIC? If not, what syntax would I use to say “IF lightSensor1 DOES NOT EQUAL 1 THEN…”

thanks **

IF lighSensor1 ~= 1 THEN …

3

Can you use the ~= between 2 variables? Where I need this, i need to say “rc_sw15~=lightOn_prev” where lightOn_prev is either a 1 or a 0. This gives me an error, saying “expected a binary operator or “)””. Can i not use this syntax between 2 varialbes or only a variable and a constant?

4

*Originally posted by CHSguard72 *
**Can you use the ~= between 2 variables? Where I need this, i need to say “rc_sw15~=lightOn_prev” where lightOn_prev is either a 1 or a 0. This gives me an error, saying “expected a binary operator or “)””. Can i not use this syntax between 2 varialbes or only a variable and a constant? **

I’m not exactly sure. I just know that ‘~’ is the PBASIC symbol for IS NOT.

5

Trust me when I tell you that the not symbol in BASIC is simply the word ‘NOT’, at least when it is at the beginning of a statement. We have fallen into the habit of writing our code to emulate C++ style if statements by using the not command:

if NOT (condition) THEN SkipifA
statement
SkipifA:

I know the new compiler uses C++ style if commands, but we decided not switch to a beta version. We just don’t trust it enough.

6

<> is the same as C/C++'s !=. For example:

if p1_y <> 127 then doStuff
is the same as
if NOT (p1_y=127) then doStuff

7

*Originally posted by CHSguard72 *
**Can you use the ~= between 2 variables? Where I need this, i need to say “rc_sw15~=lightOn_prev” where lightOn_prev is either a 1 or a 0. This gives me an error, saying “expected a binary operator or “)””. Can i not use this syntax between 2 varialbes or only a variable and a constant? **

No, we tried it yesterday.

Instead we do for bits

plow_state = ~plow_state <- that works

8

*Originally posted by rwaliany *
**No, we tried it yesterday.

Instead we do for bits

plow_state = ~plow_state <- that works **

Plowstate? Looks surprisingly like my piece of code :slight_smile: I think most bots are going to be similar.