Console I/O

Kiwi provides four core built-in functions for basic console input and output:

Function	Output stream	Adds newline?	Typical use case
print	stdout	No	Building partial lines, progress bars
println	stdout	Yes	Normal output, logging, user messages
eprint	stderr	No	Error messages, warnings, diagnostics
eprintln	stderr	Yes	Fatal errors, panic messages, CLI feedback

These four functions are builtins (not part of any package) and are always available.

For advanced features (colors, cursor control, clearing screen, reading single keys, etc.) see the console package.

For file I/O, see the fio package or the higher-level path module.

Reading input

input(prompt = "")

Reads a line from stdin until newline (Enter). Returns the line without the trailing newline character.

• If a prompt string is provided, it is printed without a newline before waiting for input.
• Blocks until the user presses Enter (or EOF is reached).

# Simple prompt
name = input("What is your name? ")
println("Hello, ${name}!")

# Validation loop (common pattern)
choice = ""
while !["y", "n", "yes", "no"].contains(choice.lowercase()) do
  choice = input("Continue? (y/n): ").trim()
end