JavaScript Statements

Variable Declarations

• let
  Declares a block-scoped local variable
• const
  Declares a block-scoped, read-only variable
• var
  Declares a function-scoped variable (not preferred in modern JavaScript)

Assignment Statements

Assignment statements assign values to variables using an assignment operator.

• Examples:
  let x = y , let x = 10

Expressions

• Literals
  100, "Hello", true, false, undefined
• Arithmetic expressions
  5 + 3, x * y, 10 / 2
• String expressions
  "hello" + " world", text.toUpperCase()
• Logical expressions
  a > b, x === y && z, !isValid
• Function calls
  myFunction(), console.log("message")
• Function expressions
  let func = function() { /* ... */ };
• Array initializers
  [1, 2, 3], ["Apple", "Banana", "Orange"]
• Object initializers
  { key: "value" }

Conditional Statements

• if...else
  Executes different blocks of code based on a condition
• switch
  Evaluates an expression and executes code blocks based on matching case values

Looping Statements

• for
  Defines a loop that executes a block of code a number of times
• while
  Defines a loop that executes a block of code while a condition is true
• do...while
  Similar to while, but guarantees at least one execution of the loop
• for...in
  Defines a loop over the enumerable properties of an object
• for...of
  Defines a loop over an iterable object (arrays, strings, etc)

Function Definition Statements

• function
  Declares a named function
• Arrow function (=>)
  A shorter syntax for defining a function expressions.

Class Definition Statements

• class
  Defines a JavaScript class

Module Statements

• import
  Imports bindings exported by another module
• export
  Exports functions, objects, or primitive values from a module

Error Handling Statements

• try...catch
  Defines a code block for handling potential errors
• throw
  Throws a user-defined exception

Other Statements

• break
  Terminates a loop or switch
• continue
  Skips the current iteration of a loop and proceeds to the next
• return
  Specifies the value to be returned by a function
• debugger
  Invokes any available debugging functionality