Working with strings and numbers

- Now that we have operators to work with,…let's look at how they interact with numbers and strings.…In the previous examples, I used simple numbers…to perform simple math operations.…Var a equals four, var b equals five,…var sum equals a plus b.…That works fine as long as both parts…of the equation is a number.…But what happens when that's not the case?…Take the following example.…Var a still equals four, but var b is now the string five.…

And var sum is still a plus b.…Now, because one of the variables contains a string,…javascript assumes you want to…combine the two strings together…and the plus symbol no longer…works as an arithmetic operator,…but as a string operator.…The result we get is the string four five, or 45…which is the first variable followed by the second variable.…Not at all four plus five.…This is how we string different types of data…together using javascript.…

Using the plus symbol as a string operator,…we add different content together…to be treated as one long string.…Any item included in such a string is treated…