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why "int i = 027;" is right and "int i = 028;" produces "integer number is too large"

 
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Hi,
why "int i = 027;" is right and "int i = 028;" produces "integer number is too large"?
 
Sheriff
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Because any number starting with "0" is considered to be an octal value, and there is no digit above 7 in octal notation. In octal, 030 is next after 027.
 
Gary Kevin
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Thinks,
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