Language Reference

Functions

Package reusable logic into plain English function definitions.

Next: conditionals Variables

Function patterns

  • Use create a function named.
  • Declare parameters with takes.
  • Return values with return.

Defining functions

Use does for multi-line bodies or returns for single-line functions.

functions.pln 
create a function named add_numbers that takes two numbers and returns their sum

create a function named greet that takes name and does
    print "Hello, " + name
    return "Greeted " + name

Calling functions

Call functions with the call verb, direct parentheses, or dot-style calls without parentheses.

calls.pln 
call greet with "Ada"
greet with "Ada"
set total to add_numbers(4, 6)
logging.error "Failed to connect"
print total

Function tips

  • Keep function names verb focused: calculate_total, format_report.
  • Use clear parameter names for readability.
  • Return early for guard clauses and error checks.