// src/main.zig
const std = @import("std");

fn sumUpTo(comptime n: u32) u64 {
    var sum: u64 = 0;
    var i: usize = 0;
    while (i < n+1) : (i+=1) {
        sum = sum + i;
    }
    return sum;
}

fn sumUpTo2(comptime n: u32) u64 {
    var sum: u64 = 0;
    for (0..n + 1) |i| {
        sum += i;
    }
    return sum;
}

pub fn main() !void {
    const r1 = comptime sumUpTo(100);
    const r2 = sumUpTo2(1_000_000);
    std.debug.print("{d}\n", .{r1});
    std.debug.print("{d}\n", .{r2});
}