Python Program to Remove Odd Indexed Characters in a String

1. Introduction

Manipulating strings is a common task in programming. Sometimes, we may need to remove characters at odd indices in a string for data processing or analysis. Python’s string manipulation capabilities allow for easy and efficient modifications of strings.

An odd indexed character in a string is a character that is located at an odd position in the string, considering the string indexing starts at 0. Therefore, the first character has an index 0 (even), the second character has index 1 (odd), and so on.

2. Program Steps

1. Define the input string.

2. Iterate over the string and collect characters that are at even indices.

3. Concatenate these characters to form the new string.

4. Display the resulting string.

3. Code Program

# Define the string
input_string = "Python Programming"

# Use string comprehension to create a new string with characters at even indices
modified_string = ''.join([input_string[i] for i in range(len(input_string)) if i % 2 == 0])

# Print the modified string
print(f"String after removing odd indexed characters: {modified_string}")

Output:

String after removing odd indexed characters: Pto rgamn

Explanation:

1. input_string is defined as "Python Programming".

2. A list comprehension is used to iterate through the string, using range(len(input_string)) to get indices of all characters.

3. The if i % 2 == 0 condition within the list comprehension checks if the index i is even.

4. If the condition is True, the character at that index is included in the new list.

5. The ''.join() function is then used to concatenate the list of characters (which now excludes characters at odd indices) into a new string modified_string.

6. The print function outputs the modified_string, which contains only the characters from the even indices of the original input_string.