[Solved] Find the error in this Kotlin operator function:class Vector(val x: Int, val y: Int) { fun minus(other: Vector) { return Vector(x - other.x, y - other.y) } } | Kotlin

Kotlin - Operators and Expressions

Find the error in this Kotlin operator function:

class Vector(val x: Int, val y: Int) {
  fun minus(other: Vector) {
    return Vector(x - other.x, y - other.y)
  }
}

AOperator keyword is missing

BFunction must declare return type Vector

CCannot use minus operator for Vector class

DFunction parameters are incorrect

Step-by-Step Solution

Solution:

Step 1: Check for the operator keyword
The function definition lacks the 'operator' keyword, which is required to overload operators.
Step 2: Role of the operator keyword
Without 'operator', the function named 'minus' is just a regular method and won't be called by the '-' syntax.
Final Answer:
Operator keyword is missing -> Option A
Quick Check:
Operator keyword is required for overloading [OK]

Quick Trick: Always include 'operator' keyword before fun for operator functions [OK]

Common Mistakes:

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