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Hey guys, welcome back to another Python
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beginner challenge. If you have been
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following along, awesome because you are
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building real programming muscles
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already. And if you're new here, don't
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worry. You're going to love this. And
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today's exercise is super practical. We
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are going to write a small Python
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program that converts Fahrenheit to
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Celsius. Yeah, just like what weather
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apps do. So we'll follow a simple
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flowchart using Python's you know input
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function and apply a little math magic
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to make it all work. So let's dive right
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So here is what our flowchart says. You
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have to start and read the values f
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which stands for Fahrenheit and use the
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formula five and 5 by 9 and then
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multiply it with F - 32 and display the
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Celsius value and that's the end. So
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it's literally three lines of code but
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don't let that fool you. There's a lot
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All right. First we need to ask user to
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enter the temperature in foreign heat.
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So now remember when we use input in
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Python it returns the value as a string
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right? So first let's take
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So whenever we use input in Python, it
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returns the value as a string
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and we can't subtract numbers from
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strings. So Python will yell at us when
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we do that. So we need to convert that
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string to float like this. You just have
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and it's a method kind of just give it.
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Now the other user can type something
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like 98.6 or 32 or even minus 40 and we
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are good to go. It will take it as a
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And now let's work on applying the
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conversion formula. So this is the cool
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part because it's the formula and here
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is the standard formula to convert
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Fahrenheit to Celsius which is
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5 by 9. So this is the actual formula
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but we have to give foreign heat here
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because that's what we declared as a
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So instead of let's give a variable name
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So this is the standard formula and
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remember to use parentheses here because
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just like in real math Python needs to
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subtract you know minus 32 from
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Fahrenheit before multiplying it by 5 by
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9. So order always matters.
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So now let's display the output. You
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just have to do print.
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foreign heat foreign heat
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but I just copied it from the web. So
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you can do the same thing.
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We are going to give Celsius and we need
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this in decimal. So point colon.2F
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and again we need this symbol.
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So this little point tof inside the f
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string that tells Python to round this
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LCS value to two decimal places. So
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instead of showing 36.6666,
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it will just show 36.67.
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All right. Here is the final working
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program. Let me just close all these
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So far and heat and we have given input
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here and we convert to float and we have
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applied formula here and we just printed
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So let's run this first.
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Like for example, if you're giving any
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So 40Ā° Fahrenheit heat is equal to
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And I just have to give some space here.
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That's where I mess up. Let's try again.
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This time let's give 80Ā° F. 80Ā° is equal
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So this is how it will work. Let me just
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give you a few bonus tips, especially if
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you're just starting out because always
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convert user input when you're doing
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In all the exercises, we follow the
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same. And also double check the
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formulas. Even one small typo can mess
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up the entire result. Though the program
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works, because of the logic, you might
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not get the expected output. And always
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try to use F strings for cleaner output
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and formatting. And don't overthink
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small problems. Break each and
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everything into steps like we did here.
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And honestly, this is how real
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programmers work every day.
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And that's it for exercise four, which
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is short, useful, and a perfect way to
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practice your Python skills. And if you
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have found this helpful, give this video
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a like, hit that subscribe button, and
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turn on the notification bell so you
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don't miss any upcoming episodes. In the
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next one, we'll take things a step
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further with new logic and challenges.
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And can't wait to see you there. Thanks
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for learning with me. Happy coding.
