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Lære Variables for Numbers | Variables in Python
Python Tutorial for Beginners

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Variables for Numbers

But we can not only assign strings to a variable. You can also assign a number.

1
coins = 70
copy

After writing the code above, every time you call the coins variable in your code, Python will know that you mean 70. You can use this variable in math and more.

Let's see how to add 20 to this variable.

1
print(coins + 20)
copy

Python remembers that coins refers to 70, so it will return 90 (70 + 20 = 90).

Unlike a string, a number does not need to be quoted. This is how Python understands that it is a number with which it can calculate mathematical expressions, and not a text string.

Python can also perform calculations that consist only of variables. For example

1234
price_of_tangerines = 15 price_of_lemon = 7 total_price = price_of_tangerines + price_of_lemon print(total_price)
copy

The variable total_price now has a value of 22.

12
original_number = 17 original_number = original_number + 8
copy

Let's look at very intresting example.

123
price_1 = "100" new_price = price_1 + 17 print(new_price)
copy

This code throws an error because Python cannot sum a string and a number.

It's time to practice.

Oppgave

Swipe to start coding

Assign a number (35) to the variable number. Add 5 to the variable number and assign the result to the same variable. Display the result on the screen using print statement.

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book
Variables for Numbers

But we can not only assign strings to a variable. You can also assign a number.

1
coins = 70
copy

After writing the code above, every time you call the coins variable in your code, Python will know that you mean 70. You can use this variable in math and more.

Let's see how to add 20 to this variable.

1
print(coins + 20)
copy

Python remembers that coins refers to 70, so it will return 90 (70 + 20 = 90).

Unlike a string, a number does not need to be quoted. This is how Python understands that it is a number with which it can calculate mathematical expressions, and not a text string.

Python can also perform calculations that consist only of variables. For example

1234
price_of_tangerines = 15 price_of_lemon = 7 total_price = price_of_tangerines + price_of_lemon print(total_price)
copy

The variable total_price now has a value of 22.

12
original_number = 17 original_number = original_number + 8
copy

Let's look at very intresting example.

123
price_1 = "100" new_price = price_1 + 17 print(new_price)
copy

This code throws an error because Python cannot sum a string and a number.

It's time to practice.

Oppgave

Swipe to start coding

Assign a number (35) to the variable number. Add 5 to the variable number and assign the result to the same variable. Display the result on the screen using print statement.

Løsning

Switch to desktopBytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenfor
Alt var klart?

Hvordan kan vi forbedre det?

Takk for tilbakemeldingene dine!

close

Awesome!

Completion rate improved to 5.88

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