A function is a block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application and a high degree of code reusing.
Defining a Function
def my_function(): print("Hello InterviewBit")
def my_function(name): print("Hello %s" %name)
Functions may return a value to the caller, using the keyword- ‘return’.
def add_numbers(x, y): return x + y
Simply write the function’s name followed by (), placing any required arguments within the brackets.
def my_function(): print("Hello InterviewBit") def add_numbers(x, y): return x + y # print "Hello InterviewBit" my_function() val = add_numbers(2, 3) print(val) # print 5
Functions with keyword arguments
def distance_travelled(t, u = 0, g = 9.81): """ Function distance_travelled calculates the distance travelled by an object with initial speed u, in a time interval of t, where acceleration due to gravity is g input: t (time taken), u (initial speed) g (acceleration due to gravity) output: distance travelled Example: >>> distance_travelled(1.0) 4.905 """ d = u*t + 0.5 * g * t**2 return d print(distance_travelled(2.0)) print(distance_travelled(2.0, u = 1.0)) print(distance_travelled(2.0, g = 9.7)) print(distance_travelled(g = 9.7, t = 2.0))
Try the following example in the editor below.
You have to complete a function named factorial which will return the factorial of the integer N.