#
# Numerical Mathematics and Computing, Fifth Edition
# Ward Cheney & David Kincaid
# Brooks/Cole Publ. Co.
# (c) 2003
#
# file:  num_integ1
#
# Numerical approximation for the integral of f(x)=exp(-x*x)
# on the interval [0, 1]:

 int(exp(-x*x), x=0..1);
 evalf(%);