The Compound Assignment Operator in Python

# Python From Zero To One (Part 5)

Day 26 of experimenting with video content

Before we try to understand +=

x = 5
# variable x is assigned to value 5

x = x + 1
# x is originally 5
# so x + 1 is 6
# variable x is assigned to (x + 1), which is 6

# x is now 6

y = 'apple'
# variable y is assigned to a string value 'apple'

y = y + 'pie'
# y is originally 'apple'
# so y + 'pie' is 'applepie'
# y is assigned to (y + 'pie')
# which means y is assigned to 'applepie'

# so y is now 'applepie'

Understanding +=

x = x + 1

is the same as

x += 1

^ we can also understand this as add 1 to x

Other compound assignment operators

x = 10

x += 1    # add 1 to x
x -= 1    # subtract 1 from x
x *= 10   # mulitply x by 10
x /= 2    # divide x by 2

x //= 3   # floor divide x by 3
x %= 10   # modulus x by 10
x **= 2   # square x

Conclusion

Hope this was clear and easy to undestand.

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