If Statements

const std = @import("std");
const print = std.debug.print;

pub fn main() void {
    var a: i64 = 2;
    if (a < 3) {
        print("{} < {}\n", .{ a, 3 });
        a = -a;
    }

    // In simple cases, we can leave out the { and }.
    if (a < 3)
        print("{} < {}\n", .{ a, 3 });

    // But we need them when there’s an 'else' clause.
    if (a > 0) {
        print("{} is positive\n", .{a});
    } else if (a == 0) {
        print("{} is zero\n", .{a});
    } else {
        print("{} is negative\n", .{a});
    }

    // We can also use 'if' as an expression.
    const b = if (a > 0) a else -a;
    print("b = {}\n", .{b});
}