Other Built-In Functions
Built-in functions for output, debugging, and logging
Built-in functions that are always available without imports.
Output
fn print(message: String)
Prints a message to stdout.
Always outputs to stdout and cannot be compiled away.
Parameters
message— The string to print
Example
print("Hello, world!")
print('Player health: {health}')
Debugging
assert
fn assert(condition: Bool, message: String)
Asserts that a condition is true. If the condition is false, the program terminates with an error.
Can be compiled away in release builds for performance.
Parameters
condition— The condition to checkmessage— Optional message to display if the assertion fails
Example
assert(index < array.len(), "Index out of bounds")
panic
fn panic(message: String)
Terminates the program immediately with an error message.
Cannot be compiled away — always included in all builds.
Parameters
message— The error message to display
Example
if health > 100 {
panic('health value is not correct {health}')
}
Logging
All logging functions can be compiled away in release builds.
warn
fn warn(message: String)
Logs a warning message.
Example
warn("Performance degradation detected")
notice
fn notice(message: String)
Logs a notice message. It is not a warning, not something that went wrong, but something you should notice.
Example
notice("network latency is high")
info
fn info(message: String)
Logs an informational message.
Example
info('Loading level: {level_name}')
debug
fn debug(message: String)
Logs a debug message.
Example
debug('Player position: ({x}, {y})')
trace
fn trace(message: String)
Logs a detailed trace message.
Example
trace("Entering update_physics() function")