Question

Which of the following are valid identifiers and why/why not :
Data_rec, _data, 1 data, data 1, my.file, asm, switch, goto, break?

Plz ans...​

Answer 1

1 data – The first character shouldn’t be a number

my.file – Periods are not allowed.

elif, lambda and break – Keywords can’t be used as identifiers

Rest are valid identifiers.