Skip to main content

- Operators in python -

 Operators :

Operators are special symbols in Python that carry out some specific operations. Arithmetic operators are used to perform mathematical operations like addition, subtraction, multiplication, etc.performing


Note: 
● + when used with a number, adds the values 
● + when used with strings, concatenates two strings 
    Eg: “hello” +” world”=” hello world” 
● String and number cannot be added, unless the number is converted to string using str().
 Eg: ”Python”+str(3) =” Python3” 
● Number * character concatenates the character that many times. Eg: 3 * ‘a’ = ‘aaa’ 

Now that we know how arithmetic operators work, let us see how python handles other operations. You must have watched/followed the cricket world cup. In that, they keep a tally of the highest run-scorer, highest wicket-taker, etc. How do they do that? By comparing values(runs/wickets); right? And what are the operators used here;
The operators are <, >, etc 

There are a few operators in Python, which help us in comparing values and they are known as comparison operators/relational operators. 

Comparison operators/relational operators help us in comparing values and returns either True/or False. 



Note : == is used for comparison. Eg: x==2,checks if x is equal to 2 = is used for assignment. Eg: x=2,assigns value 2 to x 

Let us understand this with activity now.  Try filling in the blanks.

 To travel by train, you need to have a valid identity card _________ a ticket. (and) When purchasing something from Amazon, we can opt for cash on delivery _________ pay in advance. (or) Since it is sunny, I am ________ carrying my umbrella. (not)

Note: Here we use ‘and’ when both the conditions have to be satisfied. We use ‘or’ when either one condition has to be satisfied. The operators that we are making use of here are logical operators; and, or, not. 

Logical operators:


Logical operators help in combining two conditions and return True or False.





Let us write a program where you and your friends have gone to the Phoenix mall and bought some T-Shirts of Rs 800/- each and trousers of Rs 1500/- each from the Pantaloons showroom.

 Write a program to find out the total amount payable.

Note: ● int() converts a string to an integer 






Now let us write a program where you move on to Cinemax and buy 4 tickets cost Rs 200 /- each for Avengers. You pay Rs 2000/- at the cash counter. Find out how much balance you should be getting.




With the balance amount, you plan to buy popcorn and some drinks. But some of your friends want to buy tea and samosa. So you decide to divide the balance amount among yourself. Find out how much each person gets and the balance that will be left after dividing it equally.




Now that the balance amount is 0, you decide to get some money withdrawn from the ATM. But the ATM has only Rs 2000/- notes. So check if the money entered by you will be dispensed properly. Note: Money can be dispensed only if you are entering >=2000 and also if it's multiple of 2000. 

After watching the movie, you decide to go to the play area and take a ride on ‘The Pendulum ‘.But only kids above the age of 12 or kids having weight above 35 kg will be allowed to take the ride. Write the Python statement to check this condition.





Comments

Popular posts from this blog

- Animating characters using pygame -

If you see closely you can see that the mickey mouse animation is made out of a lot of shapes.  But to create something like this we need to make a very complex code. The other way around it is to use an image, other than the basic shapes, pygame also can show images.  Using images :  Steps to use images in my game: > find the image you want to use  > move it to the directory where you have created your code  > import/load image  To load the image we will first create an object and then use the image. load method to add the image to the object.  here, we have created an object called an image.  We then use the "pygame.image.load" to find the file in the directory ocean.png has to be replaced with the filename of your file.  To place the object on a particular point of the screen we use the blit function.  this function means that we are going to add the image onto the screen at position 0,0 mickey mouse is winking  Usi...

- Object Oriented Programming -

In OOP, we can represent an entity using a class.  A class bundles data (features/properties of entity - color, height, width) and functionality (movement, expression) together.  An instance of a class is known as an object.  Which is the only cartoon series that had predicted that Trump would be elected as the president of the USA and also predicted the coronavirus spread?   Answer: Simpsons.  Simpsons is a very popular animated show. You can build something similar with python.  But have you ever wondered, how Simpsons look the same in all the series? Only his movement looking and, expression change but his main features like color, height, and face look exactly the same all the time.  This is because we create a ‘blueprint’ of Simpsons and whenever we have to simulate him on screen we use this blueprint. This keeps a record of all the features of Simpsons and recreates it whenever we want.  This is where Object-Oriented Programming(OOP) h...

– Sequences, Algorithms and Programs in Python ---

 Before moving forward, Let's learn how to install Python software in your System which is very important for the further understanding of these topics. Imagine, you are a regular customer of Uncle Sam’s Pizza restaurant, can you help Uncle Sam prepare the menu and take a printout of it? Which application will you use for that? You will type the menu using MS word and then take a printout of it. right?  So, you know that we can use MS Word to create documents. Similarly, if you want to write a python program, you need an IDE (Integrated development environment). This IDE helps you to write a python program and then run it so that you can see the result/output of the program.  Steps to install python/IDE in your local system. (Windows /MAC )   Note : Prerequisite for installing python in Windows- Windows 8 or above. go to this website .   1. Click on download python as per your OS. Mac users may download the Mac version. Windows users download depending on 32-bit...