iOS Swift - Swift Language Essentials
What will be printed by this Swift code?
let add = { (a: Int, b: Int) -> Int in a + b }
print(add(3, 4))What will be printed by this Swift code?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze the closure definition
The closure takes two Ints and returns their sum using 'a + b'.Step 2: Evaluate the print statement
Calling add(3, 4) returns 7, which is printed.Final Answer:
7 -> Option DQuick Check:
Closure output = 7 [OK]
Quick Trick: Closures return values like functions [OK]
Common Mistakes:
- Thinking 'a + b' concatenates numbers
- Expecting a syntax error due to missing return keyword (it's implicit)
- Confusing output with string concatenation
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