Swift 2.0 Study Notes (Day 13)-integer and floating-point data types, swift Study Notes

Swift 2.0 Study Notes (Day 13)-integer and floating-point data types, swift Study Notes

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Swift provides 8, 16, 32, and 64-Bit Signed and unsigned integers. These integer types follow the naming conventions of the C language. I have summarized the integer types in Swift:

 

Integer example:

Print ("UInt8 range: \ (UInt8.min )~ \ (UInt8.max )")

Print ("Int8 range: \ (Int8.min )~ \ (Int8.max )")

Print ("UInt range: \ (UInt. min )~ \ (UInt. max )")

Print ("UInt64 range: \ (UInt64.min )~ \ (UInt64.max )")

Print ("Int64 range: \ (Int64.min )~ \ (Int64.max )")

Print ("Int range: \ (Int. min )~ \ (Int. max )")

The output result is as follows:

UInt8 range: 0 ~ 255

Int8 range:-128 ~ 127

UInt range: 0 ~ 18446744073709551615

UInt64 range: 0 ~ 18446744073709551615

Int64 range:-9223372036854775808 ~ 9223372036854775807

Int range:-9223372036854775808 ~ 9223372036854775807

The above code calculates the range of each type through the min and max attributes of the integer.

The floating point type is mainly used to store decimal values or to store large integers. It can be divided into two types: float and double. The double-precision floating point uses more memory space than the floating point, and the value range and accuracy are relatively large.

 

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