Globals

Two functions are available everywhere without a module in front of them.

Methods

print()

Writes its arguments to standard output followed by a newline. Multiple arguments are joined with a single space, and each is converted to its string form first — unlike the + operator, print() is happy to mix types.

print("Hello, world!")     // >> Hello, world!
print("count:", 3, true)   // >> count: 3 true
print()                    // >> (a blank line)

Inside an http.handle() callback, print() writes to the response body rather than the terminal.

For output with a label, or output without the trailing newline, see the console module.

type()

Returns the type of the given value as a lowercase string.

print(type(1))          // >> number
print(type(3.14))       // >> number
print(type("Ghost"))    // >> string
print(type(true))       // >> boolean
print(type(null))       // >> null
print(type([1, 2]))     // >> list
print(type({ a: 1 }))   // >> map
print(type(print))      // >> library_function

Functions report function, classes report class, and an instance of any class reports instance — type() names the kind of value, not the class it came from.

class Dog {}

print(type(Dog))         // >> class
print(type(new Dog()))   // >> instance