05-operators.md

Python Operators

Video link: https://youtu.be/xTmEqNRr9T4

In this video, we learned about Python operators.

Programs in the Video

• Arithmetic Operators
• Concatenate Strings
• Program to Compute Amount After Discount
• Task: Kilometers to Miles

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An operator is a symbol that is used to perform operations om values and variables.

The most frequently used operator is =. It is used to assign data to a variable.

name = "Punit"
print(name)   # Punit

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Arithmetic Operators

Here's a list of arithmetic operators:

Addition: +
Subtraction: -
Multiplication: *
Division: /
Floor division: //
Remainder: %
Exponent: **

Examples: Arithmetic Operators

# Arithmetic operators in action

x = 5

result = x + 10 # addition
print(result)   # 15

result = x - 10 # subtraction
print(result)   # -5

result = x * 10 # multiplication
print(result)    # 50

result = x / 10 # division
print(result)   # 0.5

result = x ** 2   # exponent
print(result)     # 25

quotient = x // 2  # floor division
remainder = x % 2  # modulus

print("Quotient is", quotient) # 2
print("Remainder is", remainder) # 1

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Using parentheses

We can use parentheses to make code more readable.

# harder to understand

number = 34 * 5 - 5 / 3 # 168.33333
print(number)

# easier to understand

number = (34 * 5) - (5 / 3) # 168.33333
print(number)

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Concatenate Strings

If the + operator is used with strings, it concatenates the strings.

str1 = "Hey "
str2 = "Jude"
print(str1 + str2) # Hey Jude

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More on Assignment Operators

Multiple assignment at once

x, y = 5, 6
print(x) # 5
print(y) # 6

Compound Assignment Operators

x = 5
x += 10 # x = x + 10
x -= 10 # x = x - 10

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Program to Compute Discount

Suppose you are a university student, and you need to pay 4535 dollars tuition fee for the next semester.

The college is giving you a discount of 10% on the early payment of your tuition fee. Since it's a good offer, you decided to make an early payment. Can you find out how much money you have to pay?

fee = 4530

discount_percent = 10
discount_amount = discount_percent/100*fee
discounted_fee = fee - discount_amount

print("Fee after discount:", discounted_fee, "dollars")  # 4081.5

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Programming Task

Can you create a program to convert distance in kilometers to miles?

Formula: 1 kilometer -> 0.621371 miles

# Program to convert kilometers to files

distance_km = 564.5

conversion_ratio = 0.621371

distance_miles = distance_km * conversion_ratio

print(distance_miles) # 350.7639295