[Solved] Identify the error in this Swift REPL snippet: var message = "Welcome" print(message - "Home") — Ans: Cannot subtract strings using '-' operator | Swift

Swift - Basics and Runtime

Identify the error in this Swift REPL snippet:

var message = "Welcome"
print(message - "Home")

AVariable 'message' is immutable

BCannot subtract strings using '-' operator

CMissing semicolon at the end

Dprint function is used incorrectly

Step-by-Step Solution

Solution:

Step 1: Review the code
Variable message holds a string "Welcome".
Step 2: Check the operation
The code attempts to subtract one string from another using '-'.
Step 3: Understand Swift string operations
Swift does not support subtraction between strings.
Final Answer:
Cannot subtract strings using '-' operator -> Option B
Quick Check:
Strings can be concatenated but not subtracted [OK]

Quick Trick: Strings cannot be subtracted with '-' [OK]

Common Mistakes:

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