You have a constant declared as let base = 10. You want to calculate the area of a square with this base. Which Swift code correctly uses the constant in the calculation?

hard📝 Application Q9 of 15

Swift - Variables and Constants

You have a constant declared as let base = 10. You want to calculate the area of a square with this base. Which Swift code correctly uses the constant in the calculation?

Alet area = base * base

Bvar area = base + base

Clet area = base / 2

Dlet area = base - base

Step-by-Step Solution

Solution:

Step 1: Understand the formula for square area
The area of a square is side length multiplied by itself.
Step 2: Use the constant in the calculation
let area = base * base correctly calculates the area using the constant base.
Final Answer:
let area = base * base -> Option A
Quick Check:
Use constants in expressions without reassignment [OK]

Quick Trick: Use let constants directly in calculations [OK]

Common Mistakes:

Using addition or subtraction instead of multiplication
Declaring area as var unnecessarily
Dividing base instead of multiplying

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More Swift Quizzes

You have a constant declared as let base = 10. You want to calculate the area of a square with this base. Which Swift code correctly uses the constant in the calculation?

Step 1: Understand the formula for square area

Step 2: Use the constant in the calculation

Final Answer:

Quick Check:

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