Updated March 31, 2023
Syntax and Parameters
The isnull() is one of the methods also for the function that takes the arguments that has passed it which is to be undefined. It has its own syntax and the properties for calling the null values as the arguments.
The above codes are the basic syntax here we used the assert() method it’s one of the default methods for validating the expressions so isNull() is set and check for the arguments, parameters list, and other user-defined expressions.
Apart from that, it indicates if the value of an empty string or list of empty strings. These functions will check whether the empty strings are used or not. It also checks the strings as well as it returns the Boolean value if the value is set to true then the string is null or else it returns the false if the string is not null. If suppose the value isNull it follows the conditions as the isEmpty() method operator it checks if the string contains no characters it accepts only whitespaces. Then if we use the isBlank() method operator the string is checked and it contains no characters is only whitespaces then it accepts is null values in the variable. In application code, we can also parse and hold the field value as null with some type of reason that is whenever we have to parse the value with some operations that are failed to parse a value and also there is a mismatch from the lookup queries with using some operators. Even though there are missing some fields from the geo lookup queries with the operators also the fields are to be the transposes the operator query. When we compare the undefined and null values, undefined is the variable type and null is the object value wherever we used the null keyword in a script that signifies with the ‘no value’ or non-existence of the values if suppose the variable is shared off its assigned values so that it can simply assign it to the full value of any object.
In the Conclusion part, we have used the isnull as the keyword and functions for using with different scenarios while we passing the null as the values in codes as well as arguments in the method. It should be checked and validated wherever it’s needed in the requirement the primitive type of values is most considered in the codes as well.