wren/doc/site/modules/core/system.markdown

^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.