CODEWITHSUNDEEP
pythonfor-loop
Kobbi
Kobbi

Reputation: 129

Loop to print name, removing one character at a time

I'm having a little trouble creating a program which prints out the name of the user downwards that always removes the first character each row then when it's at the last letter go up again.

This is what i have so far: 

name = input("Put in a name: ")
name_length = len(name)

for counter in range(name_length,0, -1):    
    print(counter)

Below Is what it is supposed to end like

enter image description here

Upvotes: 1

Views: 253

Answers (3)

Kalpesh Dusane
Kalpesh Dusane

Reputation: 1495

I think it will work:

name = input("Put in a name: ")
for i in range(len(name)):          # for 1st half
    print(name[i:])
for i in range(len(name)-2,-1,-1):  # for 2nd half
    print(name[i:])

Input:

stack

Output:

stack
tack
ack
ck
k
ck
ack
tack
stack

I Split output into two halfs:

1st half:

stack
tack
ack
ck
k

Which will be achieved by 1st for loop using Slice (check to understand more Explain Python's slice notation)

And 2nd half:

ck
ack
tack
stack

Note: You can print single character in this example k in 1st for loop like i do or in 2nd for loop, it up to you.

Hope this helps.

Although I think you should use solution suggested by @Andrew it's pretty cool if you print a in his solution you get the sequence [0, 1, 2, 3, 4, 3, 2, 1, 0] for slice the string so can be done in single for loop

Upvotes: 1

Andrew
Andrew

Reputation: 1082

This is an approach that just uses a single loop and slicing to achieve the same end. It creates a list of the indices at which the slice should begin, and then steps through that list printing as it goes.

name = "Bilbo"

a = range(len(name))
a = a[:-1] + a[::-1]

for idx in a:
    print name[idx:]

Upvotes: 0

OneCricketeer
OneCricketeer

Reputation: 191844

Recursive answer

Essentially, print the same string twice, but in-between call the function again, but with the first character removed. When the start index is greater than the length of the string - 1, then you have one character left. 

def printer(str, start=0):
    s = str[start:]
    if len(str) - 1 <= start:
        print s
        return
    print s
    printer(str, start + 1)
    print s

Output 

Put in a name: cricket_007
cricket_007
ricket_007
icket_007
cket_007
ket_007
et_007
t_007
_007
007
07
7
07
007
_007
t_007
et_007
ket_007
cket_007
icket_007
ricket_007
cricket_007

Upvotes: 0

Related Questions