{{keywords>wiki library source code example reference}}
===== double =====
    double
    8 Byte
    2.3E-308 - 1.7E+308
    precision 15


You can use to find it out ;)
===== C Sourcecode Example =====
<code c>
#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */

 
int main(void)
{
   printf("double: %d bytes\n", sizeof(double) );
   return 0;
}
</code>