How can you increment a variable in JavaScript using a shorthand operator?

In JavaScript, you can increment a variable using the shorthand increment operator `++`. This operator adds 1 to the current value of the variable. Here's an example:

let count = 5;

// Incrementing the variable using the shorthand operator

count++;

console.log(count);  // Outputs: 6

In this example, `count++` is equivalent to `count = count + 1`. It increments the value of the variable `count` by 1.

You can also use the increment operator in different contexts, such as within expressions or in combination with other operators:

let x = 10;

// Incrementing and using the value in an expression

let y = x++;

console.log(x);  // Outputs: 11 (x is now incremented by 1)

console.log(y);  // Outputs: 10 (y is assigned the original value of x before the increment)

Here, `x++` increments the value of `x`, and the post-incremented value is assigned to `y`. If you want to assign the pre-incremented value to a variable, you can use the pre-increment operator `++x`.