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Program to evaluate erf(x) using Gauss method:

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# Program to evaluate erf(x) using Gauss method:
from math import*
def f(x):
 y=2/pi**0.5*exp(-x*x)
 return y
f1=open("gauss.d","w")
a=0.0
h=0.001
for n in range(0,5001,50):
 z=0
 b=a+n*h
 for i in range(1,n):
  z=z+f(a+i*h)
 r=(f(a)+f(b)+2*z)*(h/2)
 print(b,r,file=f1)
f1.close()
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