Input

I/O Operations in Scala

July 13, 2026 scala io input output files

Input and output is where Scala’s dual heritage is most visible. As a JVM language, Scala has the entire java.io and java.nio machinery available—every PrintWriter and FileWriter trick you know …

I/O Operations in Scheme

July 13, 2026 scheme io input output files

Scheme is a mostly functional language, and input/output is where its pragmatic side shows: I/O operations are side effects, performed for their consequences rather than their return values. Scheme …

I/O Operations in Smalltalk

July 13, 2026 smalltalk io input output files

In most languages, input and output go through special built-in functions: printf, scanf, open, read. Smalltalk has none of these. In a language where everything is an object and every action is a …

I/O Operations in Raku

July 12, 2026 raku io input output files

Input and output are where a program meets the outside world: the terminal, the keyboard, and the filesystem. Raku treats I/O as a first-class part of the language, giving you both convenient …

I/O Operations in REXX

July 12, 2026 rexx io input output files

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 …

I/O Operations in Roc

July 12, 2026 roc io input output files

Input and output are where a purely functional language has to be honest about the real world. In Roc, every function is pure by default — given the same arguments, it always returns the same result …

I/O Operations in RPG

July 12, 2026 rpg io input output files

Input and output are where RPG shows its heritage most clearly. The language was born as the Report Program Generator - a tool for reading business records and producing reports - so file and record …

I/O Operations in PL/I

July 11, 2026 pl-i io input output files

Input and output are where PL/I’s 1964 ambition really shows. Where FORTRAN forced you to write dense FORMAT statements and COBOL leaned on verbose DISPLAY verbs, PL/I gave programmers a layered …

I/O Operations in Prolog

July 11, 2026 prolog io input output files

Input and output occupy an unusual place in Prolog. The language is fundamentally declarative — you describe relationships and let the resolution engine search for solutions. But I/O is inherently …

I/O Operations in Python

July 11, 2026 python io input output files

Input and output (I/O) is how a program communicates with the outside world—printing results to the terminal, reading what a user types, and persisting data to files. You already met print() in Hello …

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