The initValue method is a Base method in table in D365F&O that allows you to specify a default value for a field at the time of declaration. When a variable or field is declared with the initValue keyword, the X++ runtime initializes the variable or field with the specified value at the beginning of the program execution or when a record is created.
You can use initValue with different data types in X++, including integers, strings, booleans, and other data types. Using initValue can help you simplify the code and avoid repetitive initialization of variables and fields with default values.