(i) Without using string slicing operations, create a function which takes in a string, reverse(string), and returns a new string in the reverse order.
Question
(i) Without using string slicing operations, create a function which takes in a string, reverse(string)
, and returns a new string in the reverse order.
Solution
1. Break Down the Problem
To create a function that reverses a string without using string slicing, we will:
- Initialize an empty string to hold the reversed output.
- Iterate through the original string from the last character to the first.
- Append each character to the new string.
- Return the new reversed string.
2. Relevant Concepts
We will use basic string manipulation within a loop to reverse the string. No advanced string methods or slicing will be used.
3. Analysis and Detail
We will define a function reverse(string)
that will:
- Initialize an empty variable
reversed_string
to store the reversed result. - Use a for loop to traverse the input string from the last character to the first.
- During each iteration, append the current character from the original string to
reversed_string
.
4. Verify and Summarize
After implementing the function, we will test it with various inputs to confirm it correctly reverses strings without any errors.
Final Answer
Here is the implementation of the reverse
function in Python:
def reverse(string):
reversed_string = ""
for i in range(len(string) - 1, -1, -1):
reversed_string += string[i]
return reversed_string
This function takes any input string, iterates through it backward, and constructs a new string in reverse order.
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