Question

Answer the following: 1.Identify the valid identifiers from this list and give reasons why the other identifiers are invalid: Abc_123 $xyz this_variable_stores_integers_only SI# 2.What is Null constant? 3.Differentiate the terms with examples: Punctuators, Separators. 4.What are keywords? Give examples. 5.Are the terms true and false keywords? Give reasons for your answer. 6.What is an Operator? Give examples. 7.What are non-graphic characters? Give examples. 8.Differentiate between variables and constants.

Answer 1

Answer:

Identifiers are names given to different entities such as constants, variables, structures, functions, etc. Example: int amount; double totalbalance; In the above example, amount and totalbalance are identifiers and int, and double are keywords.