Conditionals in JavaScript

Syntax:

  Basic examples of conditional structures:

• if:

    Used to execute a block of code only if a condition is true. If the condition is false, the code within the block is not executed.

  if (condition) {
    // Code to execute if the condition is true
  }



• else:

    Used together with if. If the if condition is false, the code block within else is executed.

  if (condition) {
    // Code to execute if the condition is true
  } else {
    // Code to execute if the condition is false
  }



• else if:

    Allows checking multiple conditions. If the firstif condition is false, the else if condition is evaluated. You can use multiple else if statements to handle different cases.

  if (condition1) {
    // Code to execute if condition1 is true
  } else if (condition2) {
    // Code to execute if condition2 is true
  } else {
    // Code to execute if none of the conditions are true
  }



• switch:

    Used to evaluate an expression and compare it against several possible values. It's useful when you have multiple cases that depend on the value of a single expression, rather than multiple if`/`else statements.

  switch (expression) {
    case value1:
      // Code to execute if expression === value1
      break;
    case value2:
      // Code to execute if expression === value2
      break;
    default:
      // Code to execute if none of the cases match
  }