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# Decimal to binary 4
I'm new to Python I'm trying to create a program that converts decimal to binary but am having trouble.

I understand the arithmetics of it, but I was wondering how I can add the remainders onto each other using strings. So for example, the binary of 6 would be 110. The first remainder computed would be 0, 1, and then finally 1. How do I put those three numbers together to create 110 as a string. I apologize but I hope this is a bit comprehensible.
Oct 18 '07 #1
8 9813 rhitam30111985
112 100+
I'm new to Python I'm trying to create a program that converts decimal to binary but am having trouble.

I understand the arithmetics of it, but I was wondering how I can add the remainders onto each other using strings. So for example, the binary of 6 would be 110. The first remainder computed would be 0, 1, and then finally 1. How do I put those three numbers together to create 110 as a string. I apologize but I hope this is a bit comprehensible.
keep storing the remainder in a list by using the list.append() function.. then reverse the list using list.reverse() fuction.... then join it using the join fuction ''.join(list).. and u have the binary number in the string form... now use type casting to make it an integer : int(string)

thats it
Oct 18 '07 #2
4 keep storing the remainder in a list by using the list.append() function.. then reverse the list using list.reverse() fuction.... then join it using the join fuction ''.join(list).. and u have the binary number in the string form... now use type casting to make it an integer : int(string)

thats it
Is there any way to do it without using list?
Oct 18 '07 #3
rhitam30111985
112 100+
yeah there is .. but what have u tried so far ? post your code ...
Oct 18 '07 #4
4 Expand|Select|Wrap|Line Numbers
1. n=int(raw_input("number: "))
2. b=[]
3. while n>0:
4.     q=n/2
5.     r=n%2
6.     b.append(r)
7.     if q!=0:
8.         q=n
9.     print b
10.
11.
I'm trying list but it won't work. How do I store remainders?
Oct 18 '07 #5
rhitam30111985
112 100+
Expand|Select|Wrap|Line Numbers
1. n=int(raw_input("number: "))
2. b=[]
3. while n>0:
4.     q=n/2
5.     r=n%2
6.     b.append(r)
7.     if q!=0:
8.         q=n
9.     print b
10.
11.
I'm trying list but it won't work. How do I store remainders?
this looks like an infinite loop ..

(while n>0)

n is always greater than 0. since u r not modifying its value anywhere in ur code.. anyway. using list u can do it lie this:

Expand|Select|Wrap|Line Numbers
1. a=22
2. b=[]
3. while a:
4.      b.append(a%2)
5.      a/=2
6. b.reverse()
7.
without using list:
Expand|Select|Wrap|Line Numbers
1. def binary(number):
2.      bin=0
3.      while number:
4.              remainder= number % 2
5.              bin+=remainder
6.              bin*=10
7.              number /=2
8.      while bin:
9.              number+=bin%10
10.              bin/=10
11.              number*=10
12.      return number
13.
Oct 18 '07 #6
bartonc
6,596 Expert 4TB
Thoroughly discussed here.
Oct 18 '07 #7
4 Hi there again. I'm trying to convert a decimal number into binary using two's complement. Is there a function that'll allow me to flip the integers around?
Oct 22 '07 #8
bartonc
6,596 Expert 4TB
Thoroughly discussed here.
It's close enough to the original topic that I have merge your two threads.
Oct 22 '07 #9

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