Resolved: Code crashing when calling function that formats an Objects properties into a String?

Question:

Im trying to make a function that takes an objects properties and formats them into a String, then printing out that String as a “Description”. When I run my code, I get an error “Thread 1:EXC_BAD_ACCESS (code=1, address=0x16)” with the return String highlighted red.
This is the function:

public var description: String {
        
        return String(format: "\nName: %@\nAccount Number: %@\nInterest Rate: %@\nAccount Balance: $@\nYear: %@", customerName, accountNumber, interestRate, accountBalance, year)
    }
    
}

Here is the call:

let account1 = BankAccount(accountNumber: 22, customerName: "John Smith",  interestRate: 0.3, accountBalance: 8.00, year: 2)

print(account1.description)

From what I’ve tested the object has been initialized correctly, I’m not really sure where to go from here.

Answer:

The format seems to be wrong, you have to use correct format if you want to use that method, therefore, have to use %d for integer, %f for float example:

String(format: "\nName: %@\nAccount Number: %d\nInterest Rate: %.1f\nAccount Balance: %.2f\nYear: %d", customerName, accountNumber, interestRate, accountBalance, year)

But still, recommended way for using String in swift is to use \(), like:

return "\nName: \(customerName)\nAccount Number: \(accountNumber)\nInterest Rate: \(interestRate)\nAccount Balance: \(accountBalance)\nYear: \(year)"

If you have better answer, please add a comment about this, thank you!

Resolved: Code crashing when calling function that formats an Objects properties into a String?

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