swift

There’s an even simpler way to include values in strings: Write the value in parentheses, and write a backslash () before the parentheses. This is known as string interpolation.

1. let apples = 3
2. let oranges = 5
3. let appleSummary = "I have (apples) apples."
4. let fruitSummary = "I have (apples + oranges) pieces of fruit."