Python String

🔤 Python Strings – 20 Basic Assignments

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1) Create & Print a String

Ask the user to input a sentence and print it.

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2) Access Characters

Ask user for a word and print the first and last character.

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3) String Length

Ask user for input and print its length (len()).

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4) Uppercase Conversion

Convert a user’s string to uppercase and print.

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5) Lowercase Conversion

Convert a user’s string to lowercase and print.

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6) Capitalize

Ask for a sentence and print it with the first letter capitalized.

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7) Slice a Substring

Ask user for a word and print characters from index 1 to 3.

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8) Reverse a String

Ask user for a word and print it backwards using slicing.

Example:

input: hello  
output: olleh

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9) Check Substring

Ask the user for a sentence and a word — check if the word is in the sentence.

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10) Replace a Substring

Ask for a sentence, then replace all occurrences of "a" with "@" and print.

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11) Count Characters

Ask for a sentence and count how many times “e” appears.

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12) Split on Space

Ask for a sentence and split it into words using split().

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13) Join Words

Given a list of words:

["Python", "is", "fun"]

Join into a single string with spaces.

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14) Find Index

Ask for a word and a character — print the index of the first occurrence of that character.

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15) Strip Spaces

Ask the user for a string with extra spaces at the ends. Use strip() to remove them and print.

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16) String Formatting

Ask for name and age and print:

Hello <name>, you are <age> years old.

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17) Count Words

Ask for a sentence and count how many words it has.

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18) Check Palindrome

Ask for a word. If it reads the same backward, print “Palindrome”, else “Not Palindrome”.

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19) First 3 Characters

Ask user for a word and print its first 3 characters.

If it’s shorter than 3, print the whole word.

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20) Replace Spaces with Hyphens

Ask for a sentence and convert spaces " " to hyphens "-".

Example:

Hello World → Hello-World

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📝 Notes for Students

Common string operations you’ll use:

Operation	Example Function
Length	len(s)
Uppercase	s.upper()
Lowercase	s.lower()
Slice	s[1:4]
Reverse	s[::-1]
Find	s.find('a')
Replace	s.replace('a', '@')
Strip	s.strip()
Split	s.split()

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