The math.erfc() is stands for “error function complement” and returns the complementary error function at the given real argument.

math.erfc(x)

Where, parameter is a real number.  If x is not a real number, a TypeError is raised.

The function returns  a floating point value  which is the value of the error function at x

import math

print(math.erf(0.01))
print(math.erf(0.5))
print(math.erf(2))
print(math.erf(3.142))
print(math.erf(math.e))