Question

which of the following is not a valid C variable name? a) int number b)float Rate c) int variable_count d)int$main​

Answer 1

Answer:

int$main is not a valid c variable

Step-by-step explanation:

there must ne space between the data type and the variable.

or else it wilk be a syntax error.

hope it helps you

Answer 2

int $main is not a valid C variable name.

d) int $main

Let us correct the question as it has mistakes.

Which of the following is not a valid C variable name?

a) int number

b) float rate

c) int variable_count

d) int $main

What are the rules for variables in C language?

The rules for variables in C language are:

1. Variable name can start with a letter or underscore ( _ ) character only which means it cannot start with a number.

2. C is a case-sensitive language which means variable names are also case-sensitive.

Example - These three are different variables age, AGE, Age

3. Variable names can only have alphanumeric characters (A-Z, a-z, and 0-9) and underscore ( _ )

Variable can be short or long/descriptive.

Example - x, y, z, age, gender, Address, _var, etc.

Note - Variable names can't have whitespaces and variable names can't be a keyword that is reserved such as float, int, etc.

What is case sensitivity?

Case sensitivity is the term that tells us about the programming language capability of making out differences between Upper Case Letters and Lower Case Letters.