Rexx

Hello World in REXX

Every programming journey starts with Hello World. REXX makes this incredibly simple—the language was designed from day one to be readable and intuitive.

The Code

Create a file named hello.rexx:

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Variables and Types in REXX

REXX takes a radically different approach to variables and types than most modern languages. There are no type declarations, no reserved keywords for allocating memory, and no “int” vs …

Operators in REXX

Operators are the verbs of arithmetic and logic—they combine values into expressions that produce new values. REXX, an imperative and procedural language with dynamic, typeless data, treats every …

Control Flow in REXX

Control flow is what turns a list of instructions into a program that makes decisions and repeats work. As an imperative, structured language, REXX gives you a clean, English-like set of keywords for …

Functions in REXX

Functions let you package a piece of logic under a name, give it inputs, and reuse it anywhere in your program. As an imperative, procedural language, REXX organizes reusable code into routines—blocks …

I/O Operations in REXX

Input and output are where REXX’s origins as a scripting and text-processing language really show. Because everything in REXX is a string, reading a line from the keyboard, writing a record to a …