Which of the following variable names are invalid? Justify.

(a) try

(b) 123Hello

(c) abc@d

(d) sum

 

Answer:

  1. try - invalid variable name since it is a keyword.
  2. 123Hello - invalid variable name since it starts with a digit.
  3. abc@d - invalid variable name since it has a special character.
  4. sum - valid variable name
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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.