Integer literals

Integer literals are numbers that do not have a decimal point or an exponential part. They can be represented as:

An integer literal may have a prefix that specifies its base, or a suffix that specifies its type. 

Read syntax diagramSkip visual syntax diagramInteger literal syntax
 
>>-+-decimal_constant-----+--+---------------+-----------------><
   +-octal_constant-------+  +-+-l--+--+---+-+
   '-hexadecimal_constant-'  | +-L--+  +-u-+ |
                             | +-ll-+  '-U-' |
                             | '-LL-'        |
                             '-+-u-+--+----+-'
                               '-U-'  +-l--+
                                      +-L--+
                                      +-ll-+
                                      '-LL-'

The data type of an integer literal is determined by its form, value, and suffix. The following table lists the integer literals and shows the possible data types. The smallest data type that can represent the constant value is used to store the constant.

Integer literal Possible data types
unsuffixed decimal int, long int, long long int
unsuffixed octal or hexadecimal int, unsigned int, long int, unsigned long int, long long int, unsigned long long int
decimal, octal, or hexadecimal suffixed by u or U unsigned int, unsigned long int, unsigned long long int
decimal suffixed by l or L long int, long long int
octal or hexadecimal suffixed by l or L long int, unsigned long int, long long int, unsigned long long int
decimal, octal, or hexadecimal suffixed by both u or U, and l or L unsigned long int, unsigned long long int
decimal suffixed by ll or LL long long int
octal or hexadecimal suffixed by ll or LL long long int, unsigned long long int
decimal, octal, or hexadecimal suffixed by both u or U, and ll or LL unsigned long long int

Related information


[ Top of Page | Previous Page | Next Page | Contents | Index ]