Zen++

A fast, lightweight interpreted language designed for competitive programming.

Zen++ features C-style syntax with curly braces, no semicolons, automatic type inference, and a standard library with common data structures out of the box.

Language Overview

Variables

Variables are created on first assignment. No declarations needed.

x = 42
name = "zen"
pi = 3.14

Data Types

Control Flow

// if / else if / else
if x > 0 {
    print("positive")
} else if x == 0 {
    print("zero")
} else {
    print("negative")
}

// while loop
while n > 0 {
    n--
}

// for loop — three forms
for i 5 { }              // i = 0, 1, 2, 3, 4
for i 2 5 { }            // i = 2, 3, 4
for i 10 0 -1 { }        // i = 10, 9, 8, ..., 1

Functions

fn gcd(a, b) {
    while b != 0 {
        t = a % b
        a = b
        b = t
    }
    return a
}

Operators

Arithmetic: + - * / % ** Comparison: == != < > <= >= Logical: && || ! Bitwise: & | ^ Unary: ++ -- ! (factorial, postfix) Assignment: = += -= *= /= %= **=

Vectors

v = [1, 2, 3]
push(v, 4)
print(v[0])       // 1
print(len(v))     // 4
print(pop(v))     // 4

Strings

s = "hello" + " world"
print(len(s))       // 11
print(s[0])         // ascii value of 'h'

Maps & Sets

m = map()
m.set("key", 100)
print(m.get("key", 0))   // 100
print(m.has("key"))       // 1

s = set()
s.add(5)
print(s.has(5))           // 1

Structs

struct Point {
    fn init(x, y) {
        self.x = x
        self.y = y
    }
    fn dist() {
        return (self.x ** 2 + self.y ** 2)
    }
}

p = Point()
p.init(3, 4)
print(p.dist())   // 25

Standard Library

import std

Math: min(a,b) max(a,b) abs(x) gcd(a,b)

Data Structures: Stack, Queue, Map, Set, DSU, PriorityQueue, Pair, Tuple

Built-in Functions