Tag: mainframe

A REXX clause can be coded in uppercase, lowercase or mixed case.

Multiple instructions can be coded on 1 line, as long as they are separated by a ','

A REXX program should start with a comment clause /* REXX */

Continuation of REXX instructions is achieved by using a ',' as a continuation indicator

all blanks

NULL value

name of the variable in the same (mixed) case as the name.

name of the variable in uppercase

10 / number1

name || 'number2'

number2 * 3

name > number2

output on the terminal: result = 2 3 5

output on the terminal: result = 3 2 1

output on the terminal: result = var_3 var_4 var_5

the program will terminate with an error

Ia loop unconditionally and continues with the next clause after the loop

IF var_1 = var_2 THEN var_1 = var_1 + a loop and EXEC unconditionally, but doesn't return to the caller of the EXEC.

a loop and EXEC unconditionally, returns to the caller of the EXEC and provides a return code.

a loop and EXEC unconditionally, returns to the caller of the EXEC, but doesn't provide a return code.

READ

PULL

ACCEPT

RECEIVE

This is only true if there are arguments, otherwise the parentheses must be excluded.

This is also true if there are no arguments, but the parentheses can be omitted.

This is also true if there are no arguments, the parentheses must be included.

This is always true, since there are no functions without arguments.

'123'

'Abc123'

1

0

12.3

12.3000

12.346

12.345

the external subroutine SUBROUT1 will be executed, bypassing any internal subroutines.

the internal subroutine SUBROUT1 will be executed; external subroutines aren't called.

the internal subroutines will be searched for SUBROUT1; only if there isn't an internal one, the external SUBROUT1 will be executed.

an error will occur; subroutine names must never be coded between quotes.