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{{fbdoc item="title" value="__FB_ERR__"}}----
Intrinsic define (macro value) set by the compiler

{{fbdoc item="syntax"}}##
""__FB_ERR__""
##
{{fbdoc item="desc"}}
##""__FB_ERR__""## indicates if //[[CompilerOpte|-e]]//, //[[CompilerOptex|-ex]]//, or //[[CompilerOptexx|-exx]]// was specified on the compiler command line at the time of compilation of a module.

##""__FB_ERR__""## indicates if //[[CompilerOptearray|-earray]]//, //[[CompilerOptenullptr|-enullptr]]//, or //[[CompilerOptelocation|-elocation]]// was specified on the compiler command line, or implied by use of //[[CompilerOptexx|-exx]]//, at the time of compilation of a module.

##""__FB_ERR__""## indicates if //[[CompilerOptedebug|-edebug]]//, //[[CompilerOptedebuginfo|-edebuginfo]]//, or //[[CompilerOpteassert|-eassert]]// was specified on the compiler command line, or implied by use of //[[CompilerOptg|-g]]//, at the time of compilation of a module.

Returns bit-wise ##OR## of the following values:
{{table columns="2" cellpadding="1" cells="value;description;0;'-e', '-ex', '-exx' and other error options not specified;1;'-e' was specified;3;'-ex' was specified (implies '-e');7;'-exx' was specified (implies '-e, -ex');8;'-earray' was specified (or implied by '-exx');16;'-enullptr' was specified (or implied by '-exx');32;'-eassert' was specified (or implied by '-g');64;'-edebuginfo' was specified (or implied by '-g');128;'-edebug' was specified (or implied by '-g');256;'-elocation' was specified (or implied by '-exx')"}}

##""__FB_ERR__""## is always defined.

{{fbdoc item="ex"}}
{{fbdoc item="filename" value="examples/manual/defines/fberr.bas"}}%%(freebasic)
'Example code to demonstrate a use of __FB_ERR__
dim err_command_line as ubyte
err_command_line = __FB_ERR__
select case err_command_line
case 0
print "No Error Checking enabled on the Command Line!"
case 1
print "Some Error Checking enabled on the Command Line!"
case 3
print "QBasic style Error Checking enabled on the Command Line!"
case 7
print "Extreme Error Checking enabled on the Command Line!"
case else
print "Some Unknown Error level has been set!"
end select

%%

{{fbdoc item="diff"}}
- New to ""FreeBASIC""

{{fbdoc item="see"}}
- ##[[KeyPgDdfbmt|__FB_MT__]]##
- ##[[KeyPgDdfbdebug|__FB_DEBUG__]]##
- [[CompilerOpte|Compiler Option: -e]]
- [[CompilerOptex|Compiler Option: -ex]]
- [[CompilerOptexx|Compiler Option: -exx]]
- [[ProPgErrorHandling|Error Handling]]

{{fbdoc item="back" value="CatPgDddefines|Intrinsic Defines"}}
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