When we want to creat a factoral ,the for loops can do you a favor.Now let`s do it.
a=int(input("whatever numbers do you want to calculate")) ? or ?a= eval( input()) ?
b=1
for i in range(a):
b=b*(i+1)
print(b)
#####Notice: the most important is 1*2*3*4*******a ? so easy?
And if you want to use this factorial for more than one time and you donn`t want to repeat this program again again ,then you can define your own function,just like the function inside the python. ?
def factorial(numbers):
x=1
for i in range(numbers):
x=x*(i+1)
return(x)
#$$Then you can use your own function now
y=eval(input()) ? ?or y=int(input()) ?
z=factorial(y)
print(z)
or use 6*5*4*3*2*1
# define a factoral function
def factorial(numbers):
? ? if numbers<=1:
? ? ? return 1
? ? else:
? ? ? ? return numbers*factorial(numbers-1)
y=eval(input())
z=factorial(y)
print(z)
Then i want to do this analysing in resusive program :
The following:
