Assignment Operators

In Scala, assignment operators are used to assign values to variables. Understanding these operators is crucial for manipulating data in a Scala program effectively.

Compound Assignment Operators

We have already used the basic assignment operator = which simply assigns the value on the right side of the operator to the variable on the left side.

However, Scala also supports compound assignment operators.

Addition Assignment

The addition assignment operator += simply adds the right operand to the left operand and assigns the result to the left operand.

Main


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object Main {
  def main(args: Array[String]): Unit = {
    var a = 5
    println(a)
    a += 3 // Equivalent to a = a + 3, a is now 8
    println(a)
  }
}

Subtraction Assignment

The subtraction assignment operator -= works in the same way as the addition operators performing subtraction and assignment.

Main


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object Main {
  def main(args: Array[String]): Unit = {
    var b = 10
    b -= 4 // Equivalent to b = b - 4, b is now 6
    println(b)
  }
}

Multiplication Assignment

The multiplication assignment operator *= works in the same way as the previous operators performing multiplication and assignment.

Main


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object Main {
  def main(args: Array[String]): Unit = {
    var c = 6
    c *= 2 // Equivalent to c = c * 2, c is now 12
    println(c)
  }
}

Division Assignment

The division assignment operator /= works in the same way as the previous operators performing division and assignment.

Main


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object Main {
  def main(args: Array[String]): Unit = {
    var d = 20
    d /= 4  // Equivalent to d = d / 4, d is now 5
    println(d)
  }
}

Modulus Assignment

The modulus assignment operator %= works in the same way as the previous operators performing the modulus operation (finding the remainder) and assignment.

Main


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object Main {
  def main(args: Array[String]): Unit = {
    var e = 9
    e %= 4 // Equivalent to e = e % 4, e is now 1
    println(e)
  }
}

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Seção 2. Capítulo 8