Swift Assignment Operators

Swift Assignment Operators

Use = to assign a value.

Compound assignment operators like +=, -=, *= and /= update a variable in place.

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Compound Assignment

Use compound operators like += and *= to update a variable in place.

Example

var total = 10
total += 5
print(total)
total -= 3
print(total)
total *= 2
print(total)
total /= 4
print(total)

This example shows updating a variable with compound assignment operators.

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Append to String

You can also use += with strings to append text to a mutable string variable.

Example

var s = "Hello"
s += ", Swift"
print(s)

This example appends to a string in place with +=.