Types

Question 1

What data types are supported by Swift?

Answer 1

• Bool - Boolean Value
• Int - Signed Integer Value
• UInt - Unsigned Integer Value
• Double -Double-precision (64-bit) floating-point value
• Float - Single Precision (32-bit) floating-point value
• Character - A single Unicode character
• String - An ordered collection of characters

Question 2

What is the range of values for a Int8?

Answer 2

-128 to 127

Question 3

What is the range of values for an UInt8 ?

Answer 3

0 to 255

Question 4

What is the range of values for an Int16 ?

Answer 4

-32.768 to 32.767

Question 5

How can you determine the maximum and minimum values that can be stored by each integer type?

Answer 5

By using the max and min properties.

UInt8.max // returns 255

Int16.min // returns -32768

Question 6

What are Character Literals?

Answer 6

Character Literals are single characters surrounded by double-quotes:

“A”

“B”

”!”

Question 7

What are String literals?

Answer 7

String literals are character sequences surrounded by double-quotes:

“Hello, World”