what are the legal variable in c++

Answer 1

Fan is a valid variable name considering Pascal's case.Check it out.

Answer 2

Variable name should not be c++'s language term such as

for,while, public, exit, friend and others

do not use special character like @#$!

do not use first character of a variable name as number like 3var.
however you can use var3

variable value should be that variable type such as

int is integer type that means 4,5,78,3... integers only. You cannot add character or string or float type.

c++ is strongly typed language. Use variables value accordingly, else ready to get an error.

Answer 3

1. Name3_var
2. Salary

Answer 4

Valid

x
asdfgh
ase12a
ahah_hhgg

Invalid

1dsg
&ahsh
&₹@
killer lion
Fan