Question

3) Which of the following is not a C variable name? O a) x123 Ob)x_123 c) 123x O d) _X123​

Answer 1

Answer:

the answer will be option c

Answer 2

d) _X123 is not a C variable name.

• We cannot  use underscore before a character. It can be used between two characters.  A variable is simply the name provided to a storage place that our programs can access.
• In C programming, each variable has a type that defines the size and arrangement of the variable's memory. The span of values that can be stored in that memory, as well as the set of operations that are performed on the variable.