You copied the Doc URL to your clipboard.

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.

Was this page helpful? Yes No