Question

Which of the following is not a valid variable name?
var-1
var1
Var1
var 1

Answer 1

Answer:

var 1

Explanation:

Their should not be any whitespace in the variable declared.

Answer 2

From the given following var 1 is not a valid variable name.(Last Option)

• In C, variables are the same as variables in algebra. In C, a variable is a storage unit that allocates memory space to keep a value and can take on different values at different moments during program execution.
• Letters, numerals, and the underscore (_) characters can all be used in a variable name. But obviously, there shouldn't any spaces between the letter and number. A letter must be the first character in a variable name. Some systems permit the use of an underscore as the initial character in the variable name.
• Here for only last option, there is a space between "var" and "1".