Lecture Notes: String Processing in Programming

Key Concepts

• Finding Substrings

  • When searching for a substring in a main string, if the substring is not found, the function returns -1.
  • Example: Searching for "abdeena" in a string, if not present, returns -1.

• String Functions

  • Discussed the use of string functions to check for digits and alphabets.
  • Example function checks if the string consists only of digits (1, 2, 3, etc.).
  • If a string contains only digits, it will print a specific message.

• Alphabet Check

  • Introduced a function to check if a string contains alphabets.
  • The function can differentiate between strings of digits and those containing letters.

Practical Applications

• These string functions can be used in various programming tasks where validation of input is required, such as filtering user input in applications.

Additional Notes

• Importance of handling string data correctly in software development.
• Functions should be able to give clear outputs based on the content of the strings.