Bob Nystrom
00d4fca59a
The documentation for `System.print` and `System.printAll` used square brackets (e.g., `[object]`, `[sequence]`) to denote parameters, which is inconsistent with the project's standard backtick formatting. This change updates both descriptions to use backtick-wrapped parameter names (`object`, `sequence`).
1.3 KiB
^title System Class
The System class is a grab-bag of functionality exposed by the VM, mostly for use during development or debugging.
Static Methods
System.clock
Returns the number of seconds (including fractional seconds) since the program was started. This is usually used for benchmarking.
System.gc()
Requests that the VM perform an immediate garbage collection to free unused memory.
System.print()
Prints a single newline to the console.
System.print(object)
Prints object to the console followed by a newline. If not already a string,
the object is converted to a string by calling toString on it.
:::wren
System.print("I like bananas") //> I like bananas
System.printAll(sequence)
Iterates over sequence and prints each element, then prints a single newline
at the end. Each element is converted to a string by calling toString on it.
:::wren
System.printAll([1, [2, 3], 4]) //> 1[2, 3]4
System.write(object)
Prints a single value to the console, but does not print a newline character
afterwards. Converts the value to a string by calling toString on it.
:::wren
System.write(4 + 5) //> 9
In the above example, the result of 4 + 5 is printed, and then the prompt is
printed on the same line because no newline character was printed afterwards.