Introduction to Python - Lesson 3

Lesson 3 of 16

Operators

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Code Example

print(5 + 2)
print(10 + 3)

Instructions

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The left side of the code editor is where you type your input code.
The right side of the code editor is where you see the output of your code.

Practice by typing the code example above, in the left side of the code editor below.
Then click the "Run Code" button, to run the code.
You will see the output of your code in the output section.

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Python can do math for us, like a calculator.
Operators are simply special symbols that can be used to do math.
The plus sign + means add.
print(5 + 2) tells Python to add 5 and 2, then show the answer.
print(10 + 3) does the same thing with 10 and 3, then prints the new answer.

Code Example

print(8 - 3)
print(10 - 4)

Instructions

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The code editor is below.
The left side of the code editor is where you type your input code.
The right side of the code editor is where you see the output of your code.

Practice by typing the code example above, in the left side of the code editor below.
Then click the "Run Code" button, to run the code.
You will see the output of your code in the output section.

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Python can do math for us, like a calculator.
Operators are simply special symbols that can be used to do math.
The minus sign - means subtract.
print(8 - 3) tells Python to take 3 away from 8 and show the answer.
print(10 - 4) tells Python to take 4 away from 10 and print the answer.
Each line does one math problem.
Python figures out the answer and prints it for us.

Code Example

print(4 * 2)
print(3 * 3)

Instructions

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The code editor is below.
The left side of the code editor is where you type your input code.
The right side of the code editor is where you see the output of your code.

Practice by typing the code example above, in the left side of the code editor below.
Then click the "Run Code" button, to run the code.
You will see the output of your code in the output section.

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The * sign in Python multiplies numbers together.
print(4 * 2) tells Python to multiply 4 by 2 and show the answer.
print(3 * 3) tells Python to multiply 3 by 3 and print the answer.

Code Example

print(10 / 5)
print(12 / 6)

Instructions

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The code editor is below.
The left side of the code editor is where you type your input code.
The right side of the code editor is where you see the output of your code.

Practice by typing the code example above, in the left side of the code editor below.
Then click the "Run Code" button, to run the code.
You will see the output of your code in the output section.

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The / sign in Python divides one number by another.
print(10 / 5) tells Python to divide 10 by 5 and show the answer.
print(12 / 6) tells Python to divide 12 by 6 and print the answer.
Division helps us split a number into equal parts.

Code Example

print(10 % 3) 

print(8 % 4)

print(7 % 5)

Instructions

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The code editor is below.
The left side of the code editor is where you type your input code.
The right side of the code editor is where you see the output of your code.

Practice by typing the code example above, in the left side of the code editor below.
Then click the "Run Code" button, to run the code.
You will see the output of your code in the output section.

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The % sign in Python gives back the leftover part after dividing.
print(10 % 3) shows the leftover after 10 is divided by 3.
print(8 % 4) shows the leftover after 8 is divided by 4, which is 0.
print(7 % 5) shows the leftover after 7 is divided by 5.

Code Example

number = 7
print(number % 2)
print(number % 2 == 0)
print(number % 2 == 1)

Instructions

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The code editor is below.
The left side of the code editor is where you type your input code.
The right side of the code editor is where you see the output of your code.

Practice by typing the code example above, in the left side of the code editor below.
Then click the "Run Code" button, to run the code.
You will see the output of your code in the output section.

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The % sign in Python gives the leftover part after dividing.
print(number % 2) shows the leftover when the number is divided by 2.
print(number % 2 == 0) checks if the leftover is 0.
print(number % 2 == 1) checks if the leftover is 1.
This is a simple way to check if a number is even or odd.

Code Example

number = 10
print(number % 2)
print(number % 2 == 0)
print(number % 2 == 1)

Instructions

▲ ← Click the triangle to hide or reveal instructions.

The code editor is below.
The left side of the code editor is where you type your input code.
The right side of the code editor is where you see the output of your code.

Practice by typing the code example above, in the left side of the code editor below.
Then click the "Run Code" button, to run the code.
You will see the output of your code in the output section.

Python Code Editor

Task Incomplete

Editor Input:

Editor Output:

Click "Run Code" to see the output here

The % sign in Python gives the leftover part after dividing.
print(number % 2) shows the leftover when the number is divided by 2.
print(number % 2 == 0) checks if the leftover is 0.
print(number % 2 == 1) checks if the leftover is 1.
This helps us check if a number is even or odd, and 10 is even.

Introduction to Python - Lesson 3

Operators

Introduction to Python - Lesson 3

Operators

What does the plus sign (+) mean in Python?

Question #

1/15

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What does the plus sign (+) mean in Python?

Question #

1/15

Score

0/0 - 0.0 %