Boolean

[chelsee]

Im trying to figure out how to use boolean and it isn't working Could someone help me or give me an example code? thanks[color=green][/color]

[Clayton]

Hello, and welcome to CompSci.ca!

Your question is answered here in the Turing Walkthrough. If you still don't find what you are looking for, keep looking through tutorials in the Turing Walkthrough, or post back here with example code of your problem, as well as a description of the problem.

[Prince Pwn]

code:

var lighton : boolean lighton := true if lighton = true then    put "The light is on." else    put "The light is not on." end if lighton := false if lighton = true then    put "The light is on." else    put "The light is not on." end if

[Prince Pwn]

Also, I recommend adding break to trace your code so you can see what your program is exactly doing in slow motion.

[Tony]

actually it works like

code:

var lighton : boolean := true if lighton then    put "The light is on." else    put "The light is not on." end if

and I think the following works as well

code:

put "is 2 more than 1? : ", 2 > 1

[Hackmaster]

Quote:

and I think the following works as well
Code:

put "is 2 more than 1? : ", 2 > 1

how would this work, tony? would you put a variable after this to set it to trur? or would this just put true on the screen? or... I don't know... I cuold just be missing the obvious... but... could you explain?
[/quote]

[Clayton]

because 2 > 1 is a boolean statement (it is either true or false right?) it counts a a boolean. So in this case, true would be output onto the screen.

[Tony]

Freakman is right. Any boolean operator (<=, and, or, not, etc) evaluate to a boolean value. Since put is not strictly typed, it will grab a string equivalent of the boolean value (so ether "true" or "false") and put that on the screen.

an excellent example would be

code:

put not true

[Hackmaster]

Wow... that didn't seem to obvious... um... but what use is it to ouput a boolean variable to the screen? I mean... would you be able to assign that to like a variable? I'm just gonna guess here, but...

code:

put boolvar(2>1)

maybe? I don't know. maybe someone could explain this concept's uses, because I really can't see how this would help in most programs.

[Tony]

Hackmaster wrote:

what use is it to ouput a boolean variable to the screen?

What use is it to output any variable to the screen?

[Clayton]

@Hackmaster: can you assign any variable as you did? No, not that way. Instead, you just assign a boolean variable like any other variable.

[Hackmaster]

Alright, thanks... I just can't really see where it would help in a program, outputting true or false for the user to see.

[Clayton]

maybe not necessarily for the user to see, but for debugging purposes it is very useful.