When to use String, StringBuffer and StringBuilder?

Answer:

When the content is fixed and won’t change frequently then we should go for String.

If the content is not fixed and keep on changing but Thread Safety is required then we should go for StringBuffer.

If the content is not fixed and keep on changing and thread safety is not required then we should go for StringBuilder.

Google Script for Data Entry Form in Google Spreadsheet

// function to validate the entry made by user in user form function validateEntry (){ // declare a variable and referernece of active goog...