f(x) = 1 / sqrt(2 * π) * exp(-0.5 * x^(2))
g(x) = 1 / sqrt(2 * π) * ℯ^(-0.5 * x^(2))
a = -1.7 (slider from -3 to 3, step 0.1)
b = 1.3 (slider from -3 to 3, step 0.1)
n = 3 (slider from 0 to 100, step 1)
c = RectangleSum(f, a, b, n, 0.5)
d = Integral(g, a, b)
c_1 = 0
texte1: "Somme aires rectangles : " + c + ""
texte2: "Aire sous la courbe : " + d + ""