use v5.14;
use warnings;

my $x = 2**53;
say sprintf "%d", $x;
say sprintf "%d", $x + 1;
say sprintf "%d", int( $x ) + 1;

##</code><code>##

#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>

int main( void ) {
   double x = 9007199254740992;
   printf( "%"PRIu64"\n", (uint64_t)( x               ) );
   printf( "%"PRIu64"\n", (uint64_t)( x + 1           ) );
   printf( "%"PRIu64"\n", (uint64_t)( (uint64_t)x + 1 ) );
}

##</code><code>##

9007199254740992
9007199254740992
9007199254740993