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hey guys welcome back to this channel if
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you're new then welcome to this channel
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well I'm back with one more interesting
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Python video and today we are going to
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talk about numeric numerical expressions
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so far we have talked about variables
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constants and how Python reads your
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instructions line by line in today's
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video we going to talk about something
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that you'll use all the time which are
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numeric expressions yep we are diving
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into the math in Python but don't worry
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this is not like your high school
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algebra class it's way more chill and
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once you get the hang of it you'll start
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using like second nature and let's talk
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are these numeric expressions
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so what exactly is a numeric expression
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basically it's just a math operation
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like addition subtraction multip
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multiplication and division that uses
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numbers variables and arithmetic
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operators in Python the most common
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symbols that we use are addition
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subtraction multiplication division and
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until this you guys will know but there
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are two more operators which are
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exponent or power and one more which is
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a modulus which we call remainder
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so we'll explore that
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so let's go through some clear examples
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together so if you see the result and
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here you see 10 + 5 so this is nothing
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example if you say result
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+ 5 then you can just print result
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and it will print result for you
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you will see 15 10 + 5 is 15 so this is
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one's way like we are just adding 10 and
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five nothing fancy here python reads it
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and give you the result
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and now let's try expressions with more
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here I'll use comment
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and just print the result
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so the answer is 20 because first it
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will add 7 + 3 which is 10 and into 2
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so if you observe here is where it gets
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interesting because without the
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parenthesis Python would multiply first
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even we do the same we will multi
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multiply 7 into 2 and then we will add +
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3 to it but the brackets force Python to
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add these two numbers first 3 + 7 10 and
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then it multiplies that by 2 so this is
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how it follows and it changes the
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priority of the operators by just
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changing by just adding a bracket
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so always always remember whatever
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inside the bracket it will get done
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first and it's just like doing math on
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and now let's talk about variables in
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expression and if you see here I'm
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we can add let's take two variables X
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like for example x = 5
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and when you print the result
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so here what's going on
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actually 3 into 2 6 6 + 5 11 so it is
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following this priority first these two
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things and then this number adding that
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so if you want to add these two numbers
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first and then multiply it by two what
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you have to do you have to just keep the
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brackets and change the priority of the
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operators and now the change C5 + 3 8 8
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i hope you are getting it
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and now let's talk about
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all right you know division how to do it
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10 by 2 and just print
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it's 5.0 all obviously it will give the
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value in float because division you're
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dividing something then at the time it
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will give you float python division
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always gives you a float by default even
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if the answer is a whole number so
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instead of five you will see 5.0 and
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that little 0 tells you it's a decimal
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the expression with the power
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so actually we can cover this concept in
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here itself it's like you know uh like
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if you have remember the maths
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power 5 2^ 6 so that power operator is
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nothing but these two stars so this is
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nothing but two star 3 which means 2
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cube which is 8 let me show you so
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and you see now it will be 8 the output
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will be 8 which is nothing but 2 cube is
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2 into 2 into 2 like 2 is actually
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multiplied three times
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so that's why we use the power operator
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there that's the only difference
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so it'll be super handy when you're
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dealing with formulas interest rates and
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even you know when you are building
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something cool some game logic so at the
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time this will help you
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so here it's nothing but expression with
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you know whenever you give parenthesis
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like we have did here the priority
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changes so instead of giving priority to
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we can add we can give priority to the
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addition so that is what it meant so
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that's why I gave one more example for
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explaining the expression with
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and now we also have to cover one more
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operator which is modulus which is
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nothing but it's like when you're
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dividing two numbers and whatever the
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remainder thing if when whenever you're
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dividing two numbers like for example
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here the remainder can be
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one but we want that one as output so
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you just have to give seven mod 2 and
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so it'll give one like I'll give you one
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uh good example example for this let's
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say you have seven chocolates and you
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have to share these seven chocolates to
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so in order to share them equally you
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have to give three and three to two
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persons and the leftover chocolate how
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many chocolates will be left so one so
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that is what the output it will give you
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so for example you have 10 chocolates
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and you have to give you have to share
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those chocolates to two members and then
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when you're sharing them equally how
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many chocolates will will left will be
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left in your hand it'll be zero right so
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that will be the remainder so just
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just remember this cute logic my
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professor used to explain us like this
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with this good example I hope that will
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So the remainder is zero i I hope that
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you guys will remember so that's the
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basics of numeric expressions in Python
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like we we have worked with addition
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subtraction multiplication dividing and
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more and we also worked with the
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exponential operation which is the power
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one and we also worked with the modulus
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and you will use this all the time
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whether you are building a calculator or
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when you are designing a game or just
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working with numbers play around with
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different combos try swapping
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parenthesis and see how the results
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change and that's the best way to lock
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this into your brain
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and let me know when you're ready for
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the next part all right if you are
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enjoying this series and learning
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something new do me a quick favor hit
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that like button smash the subscribe and
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turn on the notifications so you don't
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miss the next part where we'll dive into
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the inputs and outputs in Python and
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thanks for hanging out with me and let's
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keep learning Python together and see
