You want to check if a number n is between 10 and 20 inclusive in Swift. Which of the following expressions correctly uses comparison operators to do this?

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Swift - Operators and Expressions

You want to check if a number n is between 10 and 20 inclusive in Swift. Which of the following expressions correctly uses comparison operators to do this?

An > 10 || n < 20

Bn >= 10 && n <= 20

Cn == 10 && n == 20

Dn != 10 && n != 20

Step-by-Step Solution

Solution:

Step 1: Understand the range condition
To check if n is between 10 and 20 inclusive, it must be greater than or equal to 10 and less than or equal to 20.
Step 2: Analyze each option
n >= 10 && n <= 20 uses n >= 10 && n <= 20, which correctly checks the inclusive range. n > 10 || n < 20 uses OR which is incorrect for range. n == 10 && n == 20 checks if n equals both 10 and 20 simultaneously, which is impossible. n != 10 && n != 20 checks if n is not 10 and not 20, which does not ensure the range.
Final Answer:
n >= 10 && n <= 20 -> Option B
Quick Check:
Inclusive range uses >= and <= with AND [OK]

Quick Trick: Use && with >= and <= for inclusive range checks [OK]

Common Mistakes:

Using || instead of && for range
Checking equality to both ends at once
Using != which excludes values instead of range

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More Swift Quizzes

You want to check if a number n is between 10 and 20 inclusive in Swift. Which of the following expressions correctly uses comparison operators to do this?

Step 1: Understand the range condition

Step 2: Analyze each option

Final Answer:

Quick Check:

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