Swift - expm1() Function
The Swift expm1() function returns e raised to the power of specified number minus 1, i.e., ex-1. Please note that e is the base of the natural system of logarithms, and its value is approximately 2.718282.
Syntax
In Foundation framework, it is defined as follows:
public func expm1(_ x: CGFloat) -> CGFloat public func expm1(_ x: Float) -> Float public func expm1(_ x: Float80) -> Float80 public func expm1(_ __x: Double) -> Double
Parameters
x |
Specify the exponent of e. |
Return Value
Returns e raised to the power of specified number minus 1, i.e., ex-1.
Example:
In the example below, expm1() function is used to calculate e raised to the power of specified number minus one.
import Foundation
print("expm1(-2.0) = \(expm1(-2.0))")
print("expm1(-1.0) = \(expm1(-1.0))")
print("expm1(0.0) = \(expm1(0.0))")
print("expm1(1.0) = \(expm1(1.0))")
print("expm1(2.0) = \(expm1(2.0))")
The output of the above code will be:
expm1(-2.0) = -0.8646647167633873 expm1(-1.0) = -0.6321205588285577 expm1(0.0) = 0.0 expm1(1.0) = 1.718281828459045 expm1(2.0) = 6.38905609893065
❮ Swift Math Functions
