How would you declare a Swift function named calculate that takes an integer parameter without requiring an argument label when called?

easy📝 Syntax Q3 of 15

Swift - Functions

How would you declare a Swift function named calculate that takes an integer parameter without requiring an argument label when called?

Afunc calculate(number: Int) {}

Bfunc calculate(_ number: Int) {}

Cfunc calculate(number Int) {}

Dfunc calculate(_ number) {}

Step-by-Step Solution

Solution:

Step 1: Syntax for omitting argument labels
Use _ before the parameter name to omit the label.
Step 2: Check each option
func calculate(_ number: Int) {} correctly uses _ and specifies the parameter type.
Final Answer:
func calculate(_ number: Int) {} -> Option B
Quick Check:
Underscore before parameter name omits label [OK]

Quick Trick: Use underscore before parameter name to omit label [OK]

Common Mistakes:

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