A semicolon must follow an expression in a COMPUTE or
DEFINE command. To use a LET substitution in a DEFINE or COMPUTE,
you must include two semicolons in the LET syntax. You cannot create
a LET substitution for a phrase that contains a semicolon.

## Example: Using a LET Substitution in a COMPUTE or DEFINE Command

The
following LET syntax includes two semicolons, since the substitution
will be made in a COMPUTE command:

LET
SALTEST = LEVEL/A4 = IF SALARY GT 35000 THEN HIGH
ELSE LOW;;
END

Issuing the command

AND COMPUTE SALTEST

translates
the line into

AND COMPUTE LEVEL/A4 = IF SALARY GT 35000 THEN HIGH
ELSE LOW;

with one semicolon after the word LOW, as
required by the expression in the COMPUTE.