Functions

Functions in Fig are blocks of code that perform a specific task. They are declared using the fn keyword followed by the function name, parameters (if any), and return type (if any). Here's the general syntax for defining a function:

fn function_name(parameter1: type1, parameter2: type2, ...): return_type {
    // Function body
    // Code to perform the task
    return result; // (if return_type is specified)
}

Function Parameters

Functions can have zero or more parameters, which are variables used to pass data into the function. Parameters are specified within the parentheses after the function name.

fn greet(name: char[]) {
    print_str("Hello, ");
    print_str(name);
}

Return Type

Functions can specify a return type to indicate the type of value they return. If a function doesn't return any value, it doesn't specify a return type.

fn add(x: i32, y: i32): i32 {
    return x + y;
}

Calling Functions

To call a function, you simply write the function name followed by parentheses containing the arguments (if any) passed to the function.

let result = add(3, 5);

Examples

Here are some more examples of functions in Fig: Calculate Factorial

fn factorial(n: i32): i32 {
    if (n <= 1) {
        return 1;
    } else {
        return n * factorial(n - 1);
    }
}