 Now, let's convert strings into integers. You might have a situation where you're importing some text and it is in a string format but what you are actually interested in is the actual numerical value and for that we can use this pass function. So I'm going to get this computer variable called NUMB and I'll put this text in it and the semicolon just suppresses the output. Now let's take a look just to make sure that this is indeed an ASCII string. Now I'm going to create a new computer variable called VEL and I'm going to pass as an integer this piece of string. Let's go for it. And now let's look at VEL, indeed it is 1001 which now looks a bit different and indeed we can check the type of it and it is now a 64 bit integer. So that's wonderful, we can import a bit of text and we can convert it into a number. Now let's go in the other direction. So we have this VEL underscore F, floating point value 1001.123, let's run that. And just to make sure it's a 64 bit float and instead of pass I now use string and it's just this one type of string so where we used the integer before just to say what we want to pass it to here we just say the string function and we pass that argument. We're going to put this inside of a new computer variable called str underscore F, let's just do that. Let's print it to the screen and you can see the quotation marks there and just to make 100% sure let's check the type it is now an ASCII string. So we can go from string to numerical value and from a numerical value into a string. So we're going to import text and it is going to have a matrix like this, 345212381021. Now it is written like this because it might be so in the text file with the Julia notebook because we've used the carriage return here to go to a new line it's going to do this green color which might make it look like a number but it's all inside of the quotation mark so it's all just a string. Let me show you. There we go you see the new line character there so this is we can well imagine we've just imported this from a text file and I just make sure what this file underscore data is indeed it's just a string but imagine in your text file it was typed by someone to represent a matrix a 3 by 4 matrix now I can read that in as an actual matrix let's have a look I'm going to use this read DLM function it takes this argument iobuffer which takes an argument this string I'm going to put this inside of a computer variable which I've called data so let's look what data see what data looks like and indeed a 3 by 4 array of 64 bit floating numbers two dimensional in other words there's rows and columns just to make sure it is now an array of 64 but floating point elements two dimensional so that's some common new scenarios where you've imported text and you want to convert it to values or imported something that looks like a matrix and you want to convert it to a real matrix or taking a number going the other way and making a string out of it in the next section of this lesson we're going to look at finding and replacing characters and substrings inside of strings