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Hey everyone, welcome back to Simplified
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by Singum. Welcome back to our Python
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for beginners series. In today's
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exercise, we are going to write a very
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colorful program. We'll build a program
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that checks a number you enter and tells
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whether it's blue, red, green, or just
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not a valid option. Sounds cool, right?
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Let's jump in. But before coding, let's
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look at this flowchart. And also
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remember as we always say flowcharts are
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like maps that guide our program's
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So here is how it works.
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First user enters a number and if the
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number is between 0 and 10 then the
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program prints blue. If it's 10 if it's
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in between 10 and 20 then it prints red.
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If it is in between 20 and 30 then it
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will print green. But if the number
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doesn't fall into any of these ranges,
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then the program politely says that's
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not a correct color option.
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So basically the program checks each
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range step by step until it finds where
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Okay. Now let's bring this flowchart to
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life using Python. As always, all you
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Just create a variable called n. And I'm
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giving float because we are going to
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take the number and then input.
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I'm going fast because by this time if
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you have followed me from beginning and
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if you have followed each and every
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exercise with me then I think you might
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followed my pace as well. So that's why
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I'm going a bit faster instead of
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explaining because I have explained
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these before. So that's why I'm going a
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bit faster. And now it's time to work on
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And so if you observe the flow chart,
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the range of n should be in between 0
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and 10. Then only you can print blue.
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So if 0 less than n less than 10
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is n in between 0 and 10 that is what
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this condition is checking and then if
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it is in between 0 and 10 then you will
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Okay. In the same way,
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n is between 10 and 20. How you check 10
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n less than 20? Then you will print red.
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n is between 20 and 30? So obviously you
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will print green. So again l if
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20 less than n less than 30
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First, we ask the user to enter a number
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and convert into a float. So, the
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program can handle decimals too. And
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then comes the magic of conditions. If
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the number is greater than 10,
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if the number is greater than zero and
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less than 10, simply if number is in
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between 0 and 10, then you print the
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If number is greater than 10 and less
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than 20, if it is between in between 10
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and 20, then you print red. If it is in
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between 20 and 30, then you print green.
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And if none of these are true, then
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Python goes to the else part and sees
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this is not a correct color option. So
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the program works exactly like the
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flowchart checking one condition after
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Let's test it with a few examples.
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For example, let's give a number maybe
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eight and see it is giving blue. Why it
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is giving blue? So when you give 8, the
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Python will come here and it will check
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whether n is in between 0 to 10 or not.
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If it is in between 0 to 10, then
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obviously it will print blue. Then it
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will come out of the entire program. It
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don't have to run these conditions.
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Right? So that is what it is doing.
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What if you give number 50
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red? So first the Python interpreter
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comes here. It will check whether n is
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in between 0 to 10 or not. So here you
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gave 15. So n is not in between 0 and
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10. So now it comes to the l if part. It
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will check whether n is in between 10
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and 20. So the value of n is 15. So 15
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is in between 10 and 20. So this
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condition is true. So then it will print
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the output as red. Okay. What if you
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It is printing green.
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So, same thing. It comes checks in
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between 0 and 10. 25 is not in between 0
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and 10. This is false. Now, it jumps
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here. 25 is not in between 10 and 20.
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So, it jumps here. 25 is in between 20
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and 30. So, it will print green.
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And now what if the value is 45?
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This is not a correct color option
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because we gave the range from 0 till 30
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but not 45. Right? So that is why we
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just printed it as this is not a correct
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color option. See the program works
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perfectly just like our flowchart
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Great job guys. You just learned how to
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connect flowcharts with Python code to
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solve real world problems if you have
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followed these videos and previous
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episodes along with me. And I love this
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one because it shows how numbers can
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belong to different categories. Now,
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here is the deal. If you are enjoying
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these step-by-step exercises, don't
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forget to like, share it with a friend
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who is learning Python, and of course,
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subscribe to the channel so you don't
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miss the next colorful coding adventure.
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Remember, every single exercise you
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complete makes you a stronger and more
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confident Python programmer. I'll see
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you in the next one. Until then, keep
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coding, keep smiling, and keep coloring
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your logic with Python.
