Table of Contents
What is a valid variable name in C?
Rules for naming a variable A variable name can only have letters (both uppercase and lowercase letters), digits and underscore. The first letter of a variable should be either a letter or an underscore. There is no rule on how long a variable name (identifier) can be.
Which is not valid C variable name?
Explanation: For naming a C variable, capital letters, small letters, underscore, and even numbers can be used. However, the variable name cannot start with numbers and hence, 123var is incorrect. The first character of a variable name should be either an alphabet or underscore.
Is a valid variable name?
A valid variable name begins with a letter and contains not more than namelengthmax characters. Valid variable names can include letters, digits, and underscores. MATLAB keywords are not valid variable names.
Is _main () a valid variable name in C?
You program is a valid C program. main is not a reserved identifier and it is allowed to name variables as main in C. (C11, 7.1.
What are legal variable names?
A variable’s name can be any legal identifier — an unlimited-length sequence of Unicode letters and digits, beginning with a letter, the dollar sign ” $ “, or the underscore character ” _ “. The convention, however, is to always begin your variable names with a letter, not ” $ ” or ” _ “.
Which is not a valid C variable name Mcq?
Which of the following is not a valid C variable name? Explanation: Since only underscore and no other special character is allowed in a variable name, it results in an error. 9.
Which is valid C expression in Mcq?
Discussion Forum
| Que. | Which is valid C expression? |
|---|---|
| b. | int my_num = 100000; |
| c. | int my num = 1000; |
| d. | int $my_num = 10000; |
| Answer:int my_num = 100000; |
Which of the following is invalid variable names?
The invalid variable, from the following are roll-no or noll_no and SUM.
Is Main () valid?
No. It’s non-standard. The standard prototype of main is int main() with the optional command line arguments argc and argv . The int returned by main() is a way for a program to return a value to the system that invokes it.
Which of the following variable names are illegal?
A variable name must start with a letter or the underscore character. A variable name cannot start with a number. A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ) Variable names are case-sensitive (age, Age and AGE are three different variables)
What are valid variable names in C? Variable names in C are made up of letters (upper and lower case) and digits. The underscore character (“_”) is also permitted. Names must not begin with a digit. Variable name should start with letter (a-zA-Z) or underscore (_). In variable name, no special characters allowed other than underscore (_).
How do you write a variable name in C?
Variable names in C are made up of letters (upper and lower case) and digits. The underscore character (“_”) is also permitted. Names must not begin with a digit. Variable name should start with letter (a-zA-Z) or underscore (_). In variable name, no special characters allowed other than underscore (_).
What are valid and non-valid characters in identifier names?
Valid characters in identifier names include digits and non-digits and must not start with a digit. non-digits include the uppercase letters A-Z, the lowercase letters a-z, the underscore, and any implementation defined characters.
What is a valid variable name in Python?
A valid variable name begins with a letter and contains not more than namelengthmax characters. Valid variable names can include letters, digits, and underscores. One may also ask, what are the rules for variable name?