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Program to evaluate integration using Trapezoidal rule

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#Program to evaluate integration using Trapezoidal rule
from math import*
def f(x):
 y=exp(-x*x)
 return y

a=input("Enter the lower limit:")
b=input("Enter the upper limit:")
n=input("Enter the no. of divisions:")
a=float(a)
b=float(b)
n=int(n)
h=(b-a)/(n*1.)
s=0
for i in range(1,n):
 s=s+f(a+i*h)
y=(h/2)*(f(a)+f(b)+2*s)
print("The value of the integration is:",y)












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