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+--- Thread: [MicroPython] Beginner, program with lists (/thread-22349.html)
[MicroPython] Beginner, program with lists - Hellon - Nov-09-2019
Hello
So here I am a beginner in Python and I have an exercise that asks me to replace the repetition with the list but I can't understand how to use it
Here is the code :
from random import *
from math import *
n=int(input("n="))
a=0
b=0
c=0
d=0
e=0
f=0
g=0
h=0
j=0
k=0
l=0
for i in range(1,n+1):
r=randint(1,6)+randint(1,6)
if r==2:
a=a+1
if r==3:
b=b+1
if r==4:
c=c+1
if r==5:
d=d+1
if r==6:
e=e+1
if r==7:
f=f+1
if r==8:
g=g+1
if r==9:
h=h+1
if r==10:
j=j+1
if r==11:
k=k+1
if r==12:
l=l+1
print("2:"+str(a))
print("3:"+str(b))
print("4:"+str(c))
print("5:"+str(d))
print("6:"+str(e))
print("7:"+str(f))
print("8:"+str(g))
print("9:"+str(h))
print("10:"+str(j))
print("11:"+str(k))
print("12:"+str(l))So i have this idea :from random import *
from math import *
n=int(input("n="))
list = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]But I don't know how to use the list for the rest of the program 
RE: [MicroPython] Beginner, program with lists - ichabod801 - Nov-09-2019
First of all, don't name your list 'list'. That is a built-in function, and using it as a name may block code from using it.
Second, you can assign by index in the list. So if you rename your list to 'counts', then
counts[0] += 1 increases the first item in the list by 1. Also, counts[1] gives you the second item in the list.
RE: [MicroPython] Beginner, program with lists - Hellon - Nov-09-2019
Ok ! But what about the rest ?
for i in range(1,n+1):
r=randint(1,6)+randint(1,6)
if r==2:
a=a+1
if r==3:
b=b+1
if r==4:
c=c+1
if r==5:
d=d+1
if r==6:
e=e+1
if r==7:
f=f+1
if r==8:
g=g+1
if r==9:
h=h+1
if r==10:
j=j+1
if r==11:
k=k+1
if r==12:
l=l+1
print("2:"+str(a))
print("3:"+str(b))
print("4:"+str(c))
print("5:"+str(d))
print("6:"+str(e))
print("7:"+str(f))
print("8:"+str(g))
print("9:"+str(h))
print("10:"+str(j))
print("11:"+str(k))
print("12:"+str(l))How can I reduce that :/Ok, so I managed to do that, is it ok or can I reduce/optimise it more ?
from random import *
from math import *
n=int(input("n="))
sommes = [0]*11
for i in range(1,n+1):
r=randint(1,6)+randint(1,6)
if r==2:
sommes[0] += 1
if r==3:
sommes[1] += 1
if r==4:
sommes[2] += 1
if r==5:
sommes[3] += 1
if r==6:
sommes[4] += 1
if r==7:
sommes[5] += 1
if r==8:
sommes[6] += 1
if r==9:
sommes[7] += 1
if r==10:
sommes[8] += 1
if r==11:
sommes[9] += 1
if r==12:
sommes[10] += 1
print(sommes)
RE: [MicroPython] Beginner, program with lists - ichabod801 - Nov-10-2019
Look at all those ifs. Look what r is being compared to, and what index you are using with sommes. See a pattern?