def addition(a,b):

result = a + b

print("The result is :" , result)

return None

def subtraction(a,b):

print(f"The subtraction of two numbers is {a-b}")

return None

def main():

x = 9

y = 10

addition(x,y)

subtraction(x,y)

return None

if __name__ == "__main__": #So while we are importing script1 in script2, the __name__ changed to script1, so the if condition is not true, so it will not exceute the main function. So we will not get the output from the script1.

main()

#So now if we will run script2, we will only get the output of script2, no script1.

#we need to use functions from script1 in another script

#print("This is script1",__name__)