What is the difference between the data types Double and Float?

Double and Float are data types for working with floating-point numbers, differing in precision and size.

Type	Size (bits)	Approximate Precision
Float	32	6 decimal digits
Double	64	15 decimal digits

Double has a larger size and higher precision, allowing it to represent a wider range of values with less error. Float takes up less memory but is less precise. By default, most Swift functions working with floating-point numbers use Double. Using Float is justified when memory savings are critical and high precision is not required.

Example:

// Example of using Double
let doubleValue: Double = 3.1415926535
print(doubleValue)

// Example of using Float
let floatValue: Float = 3.1415926535 // Limited precision
print(floatValue)