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LEN function different in LBB and LB

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Topic: LEN function different in LBB and LB (Read 245 times)

Argand
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LEN function different in LBB and LB
« Thread started on: Feb 15^th, 2017, 10:24pm »

I notice that the LEN function in LBB is different to LB. For example the code for the string " x ", i.e. (two spaces,x,two spaces) below

PROMPT "type a string:"; string$
TotalLength = LEN(string$)
PRINT "The total number of characters in your string is :" ;
PRINT TotalLength
END

gives 5 in LBB but gives 1 in LB. So LBB counts spaces as well as letters and numbers.

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CirothUngol
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Re: LEN function different in LBB and LB
« Reply #1 on: Feb 16^th, 2017, 01:51am »

It's not the LEN() function, it's the PROMPT command. Try the following Code:

PROMPT "type a string:"; string$
string2$ = "  x  "
TotalLength = LEN(string$)
OtherLength = LEN(string2$)
PRINT "The total number of characters in your string is :" ; TotalLength
PRINT "The total number of characters in the other string is :" ; OtherLength
END

Apparently, LB does an automatic TRIM$() to remove any leading or trialing white space from PROMPT. I would be more inclined to consider it an error in LB, to be honest. I'll TRIM$() my own input, thank you. ^_^

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Richard Russell
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Re: LEN function different in LBB and LB
« Reply #2 on: Feb 16^th, 2017, 09:56am »

on Feb 16^th, 2017, 01:51am, CirothUngol wrote:

Apparently, LB does an automatic TRIM$() to remove any leading or trialing white space from PROMPT.

Interesting. I've never noticed it, no doubt because typing leading and/or trailing spaces in response to a PROMPT isn't particularly 'natural'. LBB could easily be changed of course, but it would reduce flexibility and as you say adding an explicit TRIM$() in your program is straightforward.

So I'm inclined to leave it as it is, but something to be borne in mind.

Richard.

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