Built-in Functions

Nebula provides essential built-in functions that are always available.

I/O Functions

log(...args)

Prints one or more values to standard output, separated by spaces.

log("Hello, World!")
log("Sum:", 10 + 20)
log("Name:", "Alex", "Age:", 25)

# Output:
# Hello, World!
# Sum: 30
# Name: Alex Age: 25

get()

Reads a line of input from the user. Returns a string.

log("What is your name?")
perm name = get()
log("Hello,", name)

Math Functions

sqrt(x)

Returns the square root of a number.

log(sqrt(16))   # 4
log(sqrt(2))    # 1.4142135...
log(sqrt(144))  # 12

abs(x)

Returns the absolute value of a number.

log(abs(-10))   # 10
log(abs(5))     # 5
log(abs(-3.14)) # 3.14

Type Functions

typeof(x)

Returns the type name of a value as a string.

log(typeof(42))        # "int"
log(typeof(3.14))      # "fl"
log(typeof("hello"))   # "wrd"
log(typeof(on))        # "bool"
log(typeof([1, 2]))    # "lst"
log(typeof(empty))     # "nil"

Type Names:

Value	typeof Result
Integer	int
Float	fl
String	wrd
Boolean	bool
List	lst
Map	map
Tuple	tup
Function	fn
Null	nil

Collection Functions

len(collection)

Returns the number of elements in a list, map, or characters in a string.

log(len([1, 2, 3]))     # 3
log(len("hello"))       # 5
log(len([]))            # 0
log(len({"a": 1}))      # 1

Example: Interactive Program

log("=== Calculator ===")
log("Enter first number:")
perm a = get()
log("Enter second number:")
perm b = get()

# Note: get() returns strings, need numeric conversion
perm sum = a + b
log("Result:", sum)