5.72 long long data type in C99 and C90

C99 supports the integral data type long long.

This type is 64 bits wide in the ARM compilation tools.

For example:

long long int j = 25902068371200;                // length of light
                                                 // day, meters
unsigned long long int i = 94607304725808000ULL; // length of light
                                                 // year, meters

long long is also available in C90 when not using --strict.

__int64 is a synonym for long long. __int64 is always available.

Related concepts
5.63 New language features of C99
5.65 // comments in C99 and C90
5.66 Compound literals in C99
5.67 Designated initializers in C99
5.68 Hexadecimal floating-point numbers in C99
5.69 Flexible array members in C99
5.70 __func__ predefined identifier in C99
5.71 inline functions in C99
5.73 Macros with a variable number of arguments in C99
5.74 Mixed declarations and statements in C99
5.75 New block scopes for selection and iteration statements in C99
5.76 _Pragma preprocessing operator in C99
5.77 Restricted pointers in C99
5.79 Complex numbers in C99
Related reference
9.12 long long
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