The correct answer is (c) int 3_a; Easy explanation – Variable name cannot start with a digit.
Which is an invalid variable name?
The following are examples of invalid variable names: age_ (ends with an underscore); 0st (starts with a digit); food+nonfood (contains character “+” which is not permitted)
Which of the following is a valid variable declaration?
In C language, a variable name can consists of letters, digits and underscore i.e. _ . But a variable name has to start with either letter or underscore. It can’t start with a digit. So valid variables are var_9 and _ from the above question.
Which one of the following is not a valid variable declaration?
Which of the following is not a valid variable name declaration? Explanation: Variable name cannot start with a digit. 5. Why do variable names beginning with the underscore is not encouraged?
Which is a valid variable name?
A valid variable name starts with a letter, followed by letters, digits, or underscores. MATLAB® is case sensitive, so A and a are not the same variable. The maximum length of a variable name is the value that the namelengthmax command returns.
What are 3 types of variables?
A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.
Which variable defining keyword allows its variable?
If you declare a variable with the var keyword, the variable is hoisted to the top of its enclosing scope, either global or function scope. As a result, if you access a variable before declaring it, the variable evaluates to undefined .