Swift Multiplication Assignment

Swift Multiplication Assignment Operator

In Swift, Multiplication Assignment Operator is used to compute the product of given value in right operand with the value in left operand, and assign the result back to the variable given as left operand.

In this tutorial, we will learn about Multiplication Assignment Operator in Swift language, its syntax, and how to use this operator in programs, with examples.

Syntax

The syntax of Multiplication Assignment Operator is

x *= value

where

Operand / Symbol	Description
x	Left operand. A variable.
*=	Symbol for Multiplication Assignment Operator.
value	Right operand. A value, an expression that evaluates to a value, a variable that holds a value, or a function call that returns a value.

The expression x *= value computes x * value and assigns this computed value to variable x.

Therefore the expression x *= value is same as x = x * value.

Examples

1. Multiplication Assignment of integer value to x

In the following program, we shall multiply and assign an integer value of 25 to variable x using Multiplication Assignment Operator.

main.swift

var x = 7
x *= 10
print("x is \(x)")

Output

x is 70

Explanation

x *= 10

x = x * 10
  = 7 * 10
  = 70

2. Multiplication Assignment of an expression to x

In the following program, we shall multiply and assign the value of an expression to variable x using Multiplication Assignment Operator.

main.swift

var x = 40
var y = 5
x *= (2 + y) * 4
print("x is \(x)")

Output

x is 1120

Explanation

x *= (2 + y) * 4

x = x * (2 + y) * 4
  = 40 * (2 + 5) * 4
  = 40 * 28
  = 1120

3. Multiplication Assignment with strings

We cannot use Multiplication assignment operator with string values.

main.swift

var x = "Hello "
x *= "Ram"
print("x is \"\(x)\"")

Output

Summary

In this Swift Operators tutorial, we learned about Multiplication Assignment Operator, its syntax, and usage, with examples.