Python

last week's script:

print("input a, b and c for a quadratic equation ax^2+bx+c=0")

a = float(input("a ="))

b = float(input("b ="))

c = float(input("c ="))

D = (b**2) - (4*a*c)

if D>0:

sol1 = (-b+D**0.5)/(2*a)

sol2 = (-b-D**0.5)/(2*a)

print("There are two solutions: {} and {}".format(sol1,sol2))

elif D==0:

sol3 = (-b)/(2*a)

print("There is one solution: {}".format(sol3))

elif D

print("There is no solution")

Keyword arguments: These are "extra" arguments of a function that is optional for the user to specify. Therefore, they are defined (pre-programmed) with a default value - the value that would be used by the function if the argument is not specified by the user. Instead of writing def f (x), you would define a keyword argument with def f(x=0) or def f(x=True) or whatever default value that would make sense for your function. Keyword arguments must go after positional arguments (the normal ones) and variable-length arguments. Exercise 10 Recall the script you wrote last week to print the roots of a quadratic curve. Transform that into a Python function where the y-intercept is a keyword argument that is 0 by default, and where the complex roots (for the case D