Assignment Operator (=) in JavaScript

The assignment operator (=) in JavaScript is used to assign a value to a variable. In this article, we will explore the usage of the assignment operator in JavaScript with various examples.

Assigning a Value to a Variable

The assignment operator is used to assign a value to a variable. For example:

    
      var x;
      x = 10;
      console.log(x); // Output: 10
    
  

Assigning the Value of One Variable to Another

The assignment operator can also be used to assign the value of one variable to another. For example:

    
      var x = 10;
      var y;
      y = x;
      console.log(y); // Output: 10
    
  

Updating the Value of a Variable

The assignment operator can be used to update the value of a variable. For example:

    
      var x = 10;
      x = x + 5;
      console.log(x); // Output: 15
    
  

Addition Assignment Operator (+=) in JavaScript

The addition assignment operator (+=) in JavaScript is used to add a value to an existing variable and assign the result back to the variable. In this article, we will explore the usage of the addition assignment operator in JavaScript with various examples.

Adding a Value to an Existing Variable

The addition assignment operator adds a value to an existing variable and assigns the result back to the variable. For example:

    
      var x = 10;
      x += 5; // Equivalent to x = x + 5
      console.log(x); // Output: 15
    
  

Concatenating a String to an Existing Variable

The addition assignment operator can also be used to concatenate a string to an existing variable. For example:

    
      var message = "Hello";
      message += " World"; // Equivalent to message = message + " World"
      console.log(message); // Output: Hello World
    
  

Subtraction Assignment Operator (-=) in JavaScript

The subtraction assignment operator (-=) in JavaScript is used to subtract a value from an existing variable and assign the result back to the variable. In this article, we will explore the usage of the subtraction assignment operator in JavaScript with various examples.

Subtracting a Value from an Existing Variable

The subtraction assignment operator subtracts a value from an existing variable and assigns the result back to the variable. For example:

    
      var x = 10;
      x -= 5; // Equivalent to x = x - 5
      console.log(x); // Output: 5
    
  

Multiplication Assignment Operator (*=) in JavaScript

The multiplication assignment operator (*=) in JavaScript is used to multiply an existing variable by a value and assign the result back to the variable. In this article, we will explore the usage of the multiplication assignment operator in JavaScript with various examples.

Multiplying an Existing Variable by a Value

The multiplication assignment operator multiplies an existing variable by a value and assigns the result back to the variable. For example:

    
      var x = 5;
      x *= 3; // Equivalent to x = x * 3
      console.log(x); // Output: 15