You want to check if a number n is between 10 and 20 inclusive in Swift. Which condition correctly uses logical operators?

hard📝 Application Q15 of 15

Swift - Operators and Expressions

You want to check if a number n is between 10 and 20 inclusive in Swift. Which condition correctly uses logical operators?

An >= 10 && n <= 20

Bn > 10 && n < 20

Cn >= 10 || n <= 20

D!(n < 10 && n > 20)

Step-by-Step Solution

Solution:

Step 1: Understand the range condition
To check if n is between 10 and 20 inclusive, n must be greater than or equal to 10 AND less than or equal to 20.
Step 2: Evaluate each option
n >= 10 || n <= 20 uses OR which is incorrect because it allows values outside the range. n > 10 && n < 20 excludes 10 and 20 by using > and <. !(n < 10 && n > 20) negates an impossible condition and is incorrect.
Final Answer:
n >= 10 && n <= 20 -> Option A
Quick Check:
Use AND for range checks [OK]

Quick Trick: Use && to combine lower and upper bounds [OK]

Common Mistakes:

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