# System Parameters

'SF' | Short Form Variables

## Description

Sets the compiler to restrict variable names to a single letter or a letter followed by a number.

The SHORT_FORM directive can also be used to set 'SF'. Use either SET_PARAM -'SF' or the LONG_FORM directive to cancel 'SF'.

#### Note:
System parameters 'LF' and 'SF' have reciprocal values and are directly related. Any change to 'SF' results in an opposite change to 'LF' and vice-versa.

## Default

Off - The compiler allows long variable names. Spaces are required between directives and variable names.

## See Also

SHORT_FORM Use Short Variable Names
LONG_FORM Use Long Variable Names
'LF' Long Form Variables