Factorial Calculator - Rpg Typing CST Test
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Factorial Calculator — Rpg Code
Calculates factorial of a number.
D N S 5I 0 INZ(5)
D F S 10I 0 INZ(1)
D I S 5I 0
C *ENTRY PLIST
C PARM
C FOR I = 1 TO N
C F = F * I
C ENDFOR
C WRITE FRpg Language Guide
RPG (Report Program Generator) is a high-level programming language primarily used for business applications, especially on IBM midrange systems like AS/400 and IBM i, for generating reports and handling data processing tasks.
Primary Use Cases
- ▸Generating business reports
- ▸Batch data processing
- ▸Financial calculations
- ▸Inventory and logistics management
- ▸Legacy enterprise application maintenance
Notable Features
- ▸Column-based fixed format (original RPG)
- ▸Integrated file handling for database records
- ▸Procedural and calculation-oriented
- ▸Evolved into free-format RPG IV
- ▸Strong IBM i ecosystem support
Origin & Creator
Developed in 1959 by IBM, originally for IBM 1401 systems; evolved into RPG IV on IBM i platforms.
Industrial Note
RPG powers many legacy enterprise applications in banks, manufacturing, and government systems, often running critical business processes on IBM i (AS/400) systems.