PROMAL

PROMAL (PROgrammer's Microapplication Language) is a structured programming language from Systems Management Associates for MS-DOS, Commodore 64, and Apple II. PROMAL features simple syntax, no line numbers, long variable names, functions and procedures with argument passing, real number type, arrays, strings, pointer, and a built-in I/O library. Like ABC and Python, indentation is part of the language syntax.

The language uses a single-pass compiler to generate byte code that is interpreted when the program is run. The compiler can compile to/from disk and memory. The software package for C64 includes a full-screen editor and command shell.

Reception
Ahoy! called PROMAL for the Commodore 64 "one of the best" structured languages. It concluded "As an introduction to structured programming languages and as an alternative to BASIC, PROMAL is well worth the time needed to learn it and the $49.95 to purchase it".

Example code
From the PROMAL program disk:

PROGRAM SIEVE ; Sieve of Eratosthenes Benchmark ; test (BYTE magazine) ; 10 iterations, 1800 element array. INCLUDE LIBRARY CON SIZE=1800 WORD I WORD J  WORD PRIME WORD K WORD COUNT BYTE FLAGS[SIZE] BEGIN OUTPUT "10 ITERATIONS" FOR J= 1 TO 10 COUNT=0 FILL FLAGS, SIZE, TRUE FOR I= 0 TO SIZE IF FLAGS[I] PRIME=I+I+3 K=I+PRIME WHILE K <= SIZE FLAGS[K]=FALSE K=K+PRIME COUNT=COUNT+1 OUTPUT "#C#I PRIMES", COUNT END