Quick Answer

Cannot apply operator to given operand types

Understanding the Issue

Swift operators require operands of compatible types. This error occurs when trying to use an operator with types that don't support it.

The Problem

This code demonstrates the issue:

Swift Error 
// Problem: Type mismatch
let result = "5" + 3 // Error

The Solution

Here's the corrected code:

Swift Fixed 
// Solution 1: Convert types
let result = "5" + String(3)

// Solution 2: Custom operator
func + (left: String, right: Int) -> String {
    return left + String(right)
}

Key Takeaways

Ensure operand types match operator requirements or provide custom implementations.