Determine if a string is numeric: Difference between revisions
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Thundergnat (talk | contribs) m (syntax highlighting fixup automation) |
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123xyz (base 10) => false
xyz (base 10) => false
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=={{header|FutureBasic}}==
<syntaxhighlight lang="futurebasic">include "NSLog.incl"
local fn StringIsNumeric( string as CFStringRef ) as BOOL
BOOL flag = NO
ScannerRef scanner = fn ScannerWithString( string )
if ( fn ScannerScanFloat( scanner, NULL ) )
flag = fn ScannerIsAtEnd( scanner )
end if
end fn = flag
NSLog(@"%d",fn StringIsNumeric( @"1.23" ))
NSLog(@"%d",fn StringIsNumeric( @"-123.4e5" ))
NSLog(@"%d",fn StringIsNumeric( @"alpha" ))
HandleEvents</syntaxhighlight>
{{out}}
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1
1
0
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