Integers are whole numbers without decimals. They can be positive, negative, or zero. Swift provides signed and unsigned integers in 8, 16, 32, and 64 bit forms. The type of an integer is determined by its size and whether it is signed or unsigned.
Here are some examples of integer literals in Swift:
- 42 is a 32-bit signed integer.
- 1000 is a 32-bit unsigned integer.
- -23 is a 32-bit signed integer.
- 0x1234 is a 32-bit unsigned integer in hexadecimal.
You can also create integer variables by declaring them with the let or var keyword. For example:
let myInt: Int = 42
var myOtherInt: Int = 1000
You can use integer variables in expressions just like any other variable. For example:
let sum = myInt + myOtherInt
Integers are a fundamental data type in Swift, and they are used in many different ways. For example, you can use integers to represent the number of items in a collection, the number of steps in a process, or the age of a person.
Integer Bounds
Here are the integer bounds in Swift:
- UInt8 has a range of 0 to 255.
- UInt16 has a range of 0 to 65535.
- UInt32 has a range of 0 to 4294967295.
- UInt64 has a range of 0 to 18446744073709551615.
- Int8 has a range of -128 to 127.
- Int16 has a range of -32768 to 32767.
- Int32 has a range of -2147483648 to 2147483647.
- Int64 has a range of -9223372036854775808 to 9223372036854775807.
The integer bounds are platform-dependent, meaning that they may vary depending on the computer architecture that the code is running on. For example, on a 32-bit platform, Int will be the same as Int32, but on a 64-bit platform, Int will be the same as Int64.
You can use the min and max functions to get the minimum and maximum values of an integer type. For example, the following code will print the minimum and maximum values of Int8:
print("Int8 min: \(Int8.min)")
print("Int8 max: \(Int8.max)")
This will print the following:
Int8 min: -128
Int8 max: 127
You can also use the bitWidth function to get the number of bits used to store an integer type. For example, the following code will print the number of bits used to store Int8:
print("Int8 bitWidth: \(Int8.bitWidth)")
This will print the following:
Int8 bitWidth: 8
Int
Int is a signed integer value type. On 32-bit platforms, Int is the same size as Int32, and on 64-bit platforms, Int is the same size as Int64.
Here are some examples of Int literals in Swift:
- 42 is a 32-bit signed integer.
- 1000 is a 32-bit unsigned integer.
- -23 is a 32-bit signed integer.
- 0x1234 is a 32-bit unsigned integer in hexadecimal.
You can also create Int variables by declaring them with the let or var keyword. For example:
let myInt: Int = 42
var myOtherInt: Int = 1000
You can use Int variables in expressions just like any other variable. For example:
let sum = myInt + myOtherInt
Ints are a fundamental data type in Swift, and they are used in many different ways. For example, you can use Ints to represent the number of items in a collection, the number of steps in a process, or the age of a person.
Here are some of the things you can do with Ints:
- Add, subtract, multiply, and divide them.
- Compare them to each other.
- Use them as indices into arrays and dictionaries.
- Convert them to and from strings.
- Store them in variables and constants.
Ints are a powerful tool for working with numbers in Swift.
UInt
UInt is an unsigned integer value type. It has the same size as the current platform's native word size: On a 32-bit platform, UInt is the same size as UInt32. On a 64-bit platform, UInt is the same size as UInt64.
Here are some examples of UInt literals in Swift:
- 1000 is a 32-bit unsigned integer.
- 0x1234 is a 32-bit unsigned integer in hexadecimal.
You can also create UInt variables by declaring them with the let or var keyword. For example:
let myUInt: UInt = 1000
var myOtherUInt: UInt = 0x1234
You can use UInt variables in expressions just like any other variable. For example:
UInts are a fundamental data type in Swift, and they are used in many different ways. For example, you can use UInts to represent the number of items in a collection, the number of steps in a process, or the age of a person.
Here are some of the things you can do with UInts:
- Add, subtract, multiply, and divide them.
- Compare them to each other.
- Use them as indices into arrays and dictionaries.
- Convert them to and from strings.
- Store them in variables and constants.
- UInts are a powerful tool for working with numbers in Swift.
Here are some of the differences between Int and UInt:
- Ints can represent both positive and negative numbers, while UInts can only represent positive numbers.
- Ints have a smaller range of values than UInts.
- Ints are more efficient than UInts, because they can be represented using a smaller number of bits.
In general, you should use Ints unless you specifically need an unsigned integer.
