BCA PART A 7. Explore string functions

 

# Define a sample string

sample_string = "Hello, World! This is a sample string."

# 1. Length of the string

print("1. Length of the string:", len(sample_string))

# 2. Convert the string to lowercase

print("2. Convert the string to lowercase:", sample_string.lower())

# 3. Convert the string to uppercase

print("3. Convert the string to uppercase:", sample_string.upper())

# 4. Count occurrences of a substring

substring = "is"

print("4. Count occurrences of '{}' in the string:".format(substring), sample_string.count(substring))

# 5. Check if the string starts with a specific prefix

prefix = "Hello"

print("5. Check if the string starts with '{}':".format(prefix), sample_string.startswith(prefix))

# 6. Check if the string ends with a specific suffix

suffix = "string."

print("6. Check if the string ends with '{}':".format(suffix), sample_string.endswith(suffix))

# 7. Find the index of a substring

substring = "World"

print("7. Find the index of '{}' in the string:".format(substring), sample_string.find(substring))

# 8. Replace occurrences of a substring with another substring

old_substring = "sample"

new_substring = "modified"

modified_string = sample_string.replace(old_substring, new_substring)

print("8. Replace occurrences of '{}' with '{}':".format(old_substring, new_substring), modified_string)

# 9. Split the string into a list of substrings based on a delimiter

delimiter = " "

split_string = sample_string.split(delimiter)

print("9. Split the string into substrings based on '{}':".format(delimiter), split_string)

# 10. Join a list of substrings into a single string using a delimiter

delimiter = "_"

joined_string = delimiter.join(split_string)

print("10. Join substrings into a single string using '{}':".format(delimiter), joined_string)

Output :

1. Length of the string: 382. Convert the string to lowercase: hello, world! this is a sample string.3. Convert the string to uppercase: HELLO, WORLD! THIS IS A SAMPLE STRING.4. Count occurrences of 'is' in the string: 25. Check if the string starts with 'Hello': True6. Check if the string ends with 'string.': True7. Find the index of 'World' in the string: 78. Replace occurrences of 'sample' with 'modified': Hello, World! This is a modified string.9. Split the string into substrings based on ' ': ['Hello,', 'World!', 'This', 'is', 'a', 'sample', 'string.']10. Join substrings into a single string using '_': Hello,_World!_This_is_a_sample_string.