Question

Find invalid variable names with reason:
123, Date of birth, Mark-1, first name, Emp#, emp_name, Address 1, Register number, phone No, 2nd Name

Answer 1

Answer:

123,date if birth, mark-1, first name, emp#, adress1, register number, 2nd name are the invalid names

Explanation:

variable should not being with number, and variables name should not have spaces, and variable must not contain any special characters except underscore(_) and variables must not include keywords