The switch statement provides an alternative way to execute different blocks of code based on the value of an expression. It's often used when you have multiple specific values to check against.

let dayOfWeek = "Monday";

switch (dayOfWeek) {
  case "Monday":
    console.log("Start of the work week.");
    break; // The break statement exits the switch block.
  case "Friday":
    console.log("Almost weekend!");
    break;
  case "Saturday":
  case "Sunday": // Multiple cases can share the same code block
    console.log("It's the weekend!");
    break;
  default: // Optional: executes if no case matches
    console.log("It's a regular day.");
}

Key points about switch:

• The expression in switch (expression) is evaluated once.
• The value of the expression is compared with the values of each case using strict equality (===).
• If a match is found, the code block associated with that case is executed.
• The break statement is crucial. If omitted, execution will "fall through" to the next case block, regardless of whether its condition matches.
• The default case is optional and runs if no other case matches.