Syntax and example of long

long is a type modifier that gives an integer type larger than a normal int (at least 32 bits; 64 bits on most 64-bit Linux systems).

Syntax: long variable_name; (also long int, unsigned long, long long)

Format specifiers: %ld for long, %lld for long long, %lu for unsigned long.

#include <stdio.h>
int main(void)
{
    long population = 123456789L;
    long long big = 9876543210123LL;
    unsigned long u = 4000000000UL;
    printf("%ld %lld %lu\n", population, big, u);
    printf("sizeof(long) = %d\n", (int)sizeof(long));
    return 0;
}

Output (64-bit Linux; on Windows sizeof(long) is 4):

123456789 9876543210123 4000000000
sizeof(long) = 8