# How to Count the Sum of Two Representations in JavaScript?

In JavaScript, you can count the sum of two numbers by using the `+` operator. The `+` operator performs addition and concatenation, depending on the operands. When both operands are numbers, the `+` operator performs addition.

Here’s an example of how you can count the sum of two numbers in JavaScript:

``````var x = 10;
var y = 20;
var sum = x + y;
console.log(sum); // 30``````

In the example above, the variables `x` and `y` are assigned the values `10` and `20`, respectively. The sum of `x` and `y` is calculated by using the `+` operator, and the result is assigned to the variable `sum`. Finally, the value of `sum` is logged to the console.

You can also use the `+` operator to add two string representations of numbers. In this case, the `+` operator performs concatenation, but you can still get the sum by converting the strings to numbers using the `Number` function or a unary plus operator `+`.

Here’s an example of how you can count the sum of two string representations of numbers in JavaScript:

``````var x = "10";
var y = "20";
var sum = Number(x) + Number(y);
console.log(sum); // 30``````

In this example, the variables `x` and `y` are assigned the string values `"10"` and `"20"`, respectively. The sum of `x` and `y` is calculated by converting the strings to numbers using the `Number` function, and the result is assigned to the variable `sum`. Finally, the value of `sum` is logged to the console.