Types

BrainRot Lang is dynamically typed — variable types are determined at runtime. There are seven built-in types.

Data Types

Type	BrainRot	Example	Notes
Integer	`INT`	`42`	64-bit signed
Float	`FLOAT`	`3.14`	64-bit float
String	`STRING`	`"hello"`	UTF-8, double-quoted
Boolean	`fr_fr` / `cap`	`fr_fr`	true / false
Nil	`ghosted`	`ghosted`	absence of value
Array	`[...]`	`[1, 2, 3]`	dynamic, mixed types
Function	`let_him_cook`	—	first-class values

types.brt

let_him_cook main() {
    trust_me_bro i = 42           # INT
    trust_me_bro f = 3.14         # FLOAT
    trust_me_bro s = "hello"      # STRING
    trust_me_bro b = fr_fr        # BOOLEAN (true)
    trust_me_bro n = ghosted      # NIL
    trust_me_bro arr = [1, 2, 3]  # ARRAY

    say_my_name(i + 1)    # 43
    say_my_name(f * 2.0)  # 6.28
    say_my_name(s + "!")  # hello!
}

Type Coercion

BrainRot Lang does not do implicit type coercion. Adding an integer to a string will produce a runtime type error. Arithmetic between INT and FLOAT auto-promotes to FLOAT.

Arrays

Arrays are ordered collections created with bracket syntax. They support mixed types and integer indexing. Array bounds are checked at runtime.

arrays.brt

let_him_cook main() {
    trust_me_bro nums = [10, 20, 30, 40, 50]

    # Access elements by index
    say_my_name(nums[0])   # 10
    say_my_name(nums[2])   # 30

    # Arrays can hold mixed types
    trust_me_bro mixed = [1, "two", fr_fr, ghosted]
    say_my_name(mixed[1])  # two
}

Next: Examples →