if/else और switch — मुख्य तरीके

// else if — three or more branches
const temp = 18;

if (temp >= 30) {
  console.log("Hot");
} else if (temp >= 15) {
  console.log("Mild");
} else {
  console.log("Cold");
}

// switch — clean matching on a single value
const day = "Mon";

switch (day) {
  case "Mon":
    console.log("Start strong");
    break;
  case "Fri":
    console.log("Finish line");
    break;
  default:
    console.log("Keep going");
}

// Guard clause — return early for invalid input
function greet(name) {
  if (!name) {
    console.log("Name required");
    return;
  }
  console.log("Hello, " + name + "!");
}

greet("");
greet("Ayla");