Example

For the following source, integer variables declared with no explicit size occupy 4 bytes rather than 2, with or without the -i2 option on the command line. This rule does not change the size of integer constants, only variables.

       OPTIONS /I4 
       PROGRAM FFT 
       ... 
       END 

By way of contrast, if you use /NOI4, then all integer variables declared with no explicit size occupy 2 bytes rather than 4, with or without the -i2 option on the command line. However, integer constants occupy 2 bytes with -i2, and 4 bytes otherwise.