Introduction to 'var s=-Javascript'

When it comes to writing code in JavaScript, variables play a crucial role as they allow us to store and manipulate data. One way to declare a variable in JavaScript is using the var keyword.

Syntax of using 'var' keyword

The syntax to declare a variable using var in JavaScript is:

var variableName = value;

Here, variableName is the name of the variable, and value is the data that we want to store in the variable.

Dealing with negative values

JavaScript also allows us to assign negative values to variables. We can use the - sign to indicate a negative value. For example, consider the following code:

var s = -5;

Here, we have assigned the value -5 to the variable s.

Working with 'var' keyword

Using the var keyword, we can declare variables in JavaScript with ease. The variables declared using var are function-scoped, which means that they are accessible only within the function in which they are declared.

function example() {
  var s = -5;
  console.log(s);
}

example(); // Output: -5
console.log(s); // Output: ReferenceError: s is not defined

In the above code, we have defined a function example in which the variable s is declared using the var keyword. We can access the value of s within the function, but not outside of it.

Conclusion

The var keyword is an essential component of JavaScript that allows us to declare variables. By using the syntax that we have discussed and understanding the scope of the variables, we can use this keyword to write dynamic and robust JavaScript code.