from math import*
import matplotlib.pyplot as plt

def f(x):
    return exp(-x**2)

def Euler(n):
    h=1/n
    x=0;L_x=[x]
    y=0;L_y=[y]
    
    for k in range(n):
        y=y+h*f(x)
        x=x+h
        L_x.append(x)
        L_y.append(y)
    
    # Affichage graphique
    plt.plot(L_x,L_y)  
    plt.show()
    
    return L_x,L_y