Python Handbook For Beginners - стр. 5

film = "Super Cat"

print(film)

Let's break it down:

1) First, we declared a variable and gave it a name – film.

2) Then we assigned a value to the variable – Super Cat.

3) Then, on a second line, we wrote a print function.

And finally, we passed the variable name to the print function, putting it in the function brackets.

Every time we create a variable and pass its name to the print function, it will output the variable's value, just like in our example.

Now you know how programmers display variables in Python. It doesn't seem too tricky. Let's have some practice. Below is the code that is missing some elements. You have to fix it so the program could create a variable and display its value.

= " "

()

By now, you should have sufficient knowledge and skills to accomplish this task. When done, iterate on it as long as you like. Change variable names and values. Hone on your new skills!

In chapter two, we have accomplished the following:

1) Learned what a variable is;

2) Created our first variable;

3) Learned how to display variable values.

1. What is the purpose of variables?

1) Computers use variables to store information.

2) Computers use variables to change information.

3) Computers use variables to retrieve or delete information.

2. If a variable name consists of two or more words, you shall connect them using:

1) Underscore.

2) Dash line.

3) Write the words together, without space.

4) Write the words together with a capital letter without space.

3. We can display a variable on the screen by:

1) Using the print() function and passing the print command in its parentheses.

2) Using the print() function and passing the value of the variable in its parentheses.

3) Using the print() function and passing the name of the variable in its parentheses.

4. Arrange the parts of the code so that the program creates and displays the variable.

(name)

name

=

print

"John Doe"

You already know that integers, like 5 or 10, and fractional numbers, like 5.5 or 10.7, also called float from your school math classes. Python works with both types of numbers. It also works with relevant math operators, which are coming further.

Python allows you to work with numbers using relevant math operators, that are:

1) Addition operator: +

2) Subtraction operator: -

3) Multiplication operator: *

4) Division operator: /

Let's jump into the console to work with some numbers and math operators.

Run empty console and hit repl button, which you already know. You should get an empty input field: input 2+2, and hit enter. What's the number you've got? Now, using the same field, subtract 5 out of 10, using subtraction operator: – Let's also multiply 5 by 5, using the multiplication operator: * Finally, let's divide 10 by 2, using the division operator: /