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+(id)numberWithBool:(BOOL)num |
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+(id)numberWithChar:(char)num |
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+(id)numberWithInt:(int)num |
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+(id)numberWithLong:(long)num |
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+(id)numberWithFloat:(float)num |
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+(id)numberWithDouble:(double)num |
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-(NSString*)stringValue |
return a textual representation of the number |
