Your first program

Create a file named hello.chuchu:

hello.chuchu

assign x to 10
assign y to 20
show x + y

Compile it, then run the executable separately:

cheeku hello.chuchu -o hello
./hello

Output

30

assign introduces a variable. to separates its name from its value. show prints a scalar value followed by a newline. Each statement is separated by a newline.

Using a compiler you have not installed

Replace cheeku with the path to your release binary, such as ./target/release/cheeku from the compiler repository.

Change a value

A variable keeps the type inferred from its declaration. Use reassign to update it:

assign counter to 0
while counter < 3 {
    show counter
    reassign counter to counter + 1
}

This prints 0, 1, and 2 on separate lines.

Write a function

Function parameters and return values have explicit types:

function square(x: int) -> int {
    return x * x
}

show square(10)

The output is 100. The argument and return value are integers.

Work with a numerical array

assign a to [1, 2, 3]
assign b to [4, 5, 6]
show sum(a * b)

a * b multiplies corresponding elements, producing [4, 10, 18]. sum adds them and prints 32.

What happens when you compile?

Cheeku validates source syntax and types, generates LLVM IR, optimizes it, emits an object file, and links an executable. Successful compilation is normally quiet. The default optimization level is O2.

Continue with variables and scope, or browse complete examples.