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Hey everyone, welcome back to another
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episode in our Python basics series. So
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today we are going to talk about
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something super important which is type
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conversion. So now if you have ever
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tried adding a string and a number and
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got an error or ever wondered how to
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turn your user input into numbers, you
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can actually do math with this episode
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So grab your keyboard and let's get
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So first what is type conversion? First
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things first, what does type conversion
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even mean? Type conversion is just a
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fancy way of saying changing a value
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from one data type to another. like for
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example turning a string like 42 into a
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number 42 or changing a number into a
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string so you can join it with the text.
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So why does this matter? Because in
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Python different data types behave
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differently. You can't add a number to a
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string without converting it or compare
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values correctly if there are different
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data types. So type conversion helps
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your data to handle the right way and
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So let's start with converting to an
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Say you get user input and remember
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input always comes in as a string
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and we need it to be integer number. So
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we are converting the text to an
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So this will be using the int method and
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inside we are going to give the text
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Okay. So what we are expecting is this
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text is actually a 42 and we are
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converting it to integer 42 and 42 + 10
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will be 52. Let's check.
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Yep. So what we did here we took the
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string 42 and used the integer to turn
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it into a number. And now we can do math
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So the pro tip is always use integer
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when you expect a whole number from user
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input like age or quantity.
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So now let's say you have a number but
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you want to combine it with the text
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equal to sum 1 2 3 and text number. So
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you are converting the
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text sorry so you are converting the
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integer to the string which is text. So
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for that you will use string which is
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and we are sending integer number here.
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Now you just have to print
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So what happening is if you see your
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score is 123 it worked because now it's
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So what we did we send the number we
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need it in string. So that is what we
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did. So we actually changed it to string
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by using the method str function.
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So and then we have concatenated the
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string. That means we just added two
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strings so so that it can print the
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So the pro tip here is anytime you are
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building a sentence with the numbers you
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always have to convert them with the
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string first and then you have to
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You can also do something like this
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by just giving comma here and you can
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still do that but in some cases we have
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to add plus in between you know the
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strings you have to concatenate. So at
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that time this is really important. All
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right. What if you need to work with
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decimals? You can use float.
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you can see the text number here 3.14
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and we need the decimal number. So
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equal to so load of the text number and
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now we want decimal number
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And now if you run this.
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So here we are giving the text
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3.14 which is in string and we are
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converting it to the float because we
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need it in float. So then it will be
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text number float of text number and
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then it we are actually doing it
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multiplying it with two. So that is what
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So whenever you expect decimal numbers
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like prices or weights or measurements,
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always keep that in mind that we have to
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convert the text into the float.
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Finally, let's talk about converting to
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boolean or bool. Booleans are either
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true or false. We have already checked
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like we have already worked with the
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data types before. I want you to go back
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if you still have any doubts regarding
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the data types then please go back and
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check the video then come back here and
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start working on it. If you have any
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doubts you can just drop down them in
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the comments. We are always here to help
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So what if you want to check if a value
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is exist or is empty.
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So, Python has a simple rule like zero,
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empty strings, empty list and none are
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considered as false. So, whatever the
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values that you give zero or it could be
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could be zero or any empty string like
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any list. We are going to talk about
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that in the future. You don't have to
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worry about that first for now. and
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none. So then it will take these values
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So other than that whatever you give
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will comes under true.
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boole of zero. So if you run this one,
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let me just keep everything in comments.
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So it is taking it as false and like if
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and let's just also give
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empty string as well.
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And then you can give
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if you see boolean of zero is that true
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or false. So this function is always
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checks whether the value is true or
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false. So whenever you give zero or
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empty string or none then it will take
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it as false. So 0 is false and 42 is
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some value is there. So it will consider
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it as true other than zero none you know
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empty string. So here it is an empty
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string so it is considering it as false
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and here you gave some value so it will
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take it as true. So you can use bool to
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quickly check if a value is empty or non
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zero which is super useful for
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conditions which we are going to talk
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about in the upcoming sessions. You
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don't have to worry. So the pro tip here
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is this is really a lifesaver when
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checking user input or optional
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And that's your crash course on type
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conversion in Python. And I think we
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have covered int for integers,
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string for strings, str for strings and
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float for decimal numbers,
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float for decimal numbers, and bool for,
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you know, true or false. Master these
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four and you will be able to handle user
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input, process data correctly, and avoid
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a ton of frustrating bucks. If this
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video helped you out, go ahead and like,
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subscribe, and tap the bell icon so you
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never miss an episode in this series.
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Thanks for coding with me, and I'll see
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you in the next one where we'll dive
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into even more cooler stuff.
