How many of the following are invalid
variable name?
NUMBER
first.name
midname. _num ​ 93num
num93
last name ​ nUMBER
4321
1. 5
2. 3
3. 2
4. More than 5

• No of invalid variable is 4. the nvalid variables are the following
  first.name // special character other than '_' is not allowed
  midname._num 93num // special character other than '_' is not allowed
  last name nUMBER //space is not allowed
  4321 // variable name should start with either an alphabet or '_' character
• 5 years agoHelpfull: Yes(9) No(1)
• All variable names must begin with a letter of the alphabet or an. underscore( _ ). ...
  After the first initial letter, variable names can also contain letters and numbers. ...
  Uppercase characters are distinct from lowercase characters. ...
  You cannot use a C++ keyword (reserved word) as a variable name.
  
  soo 3 of these are invalid
  ans:-option 2
• 6 years agoHelpfull: Yes(4) No(2)
• #include
  int main()
  {
  Int a, b;
  Printf("enter the values if a and b") ;
  Scanf("%d %d", &a, & b) ;
  b=a+b;
  a=b-a;
  b=b-a;
  printf("%d%d", a, b) ;
  Return(0);
  }
• 5 years agoHelpfull: Yes(4) No(3)
• Characters Allowed :
  Underscore(_)
  Capital Letters ( A – Z )
  Small Letters ( a – z )
  Digits ( 0 – 9 )
  Blanks & Commas are not allowed
  No Special Symbols other than underscore(_) are allowed
  First Character should be alphabet or Underscore
  Variable name Should not be Reserved Word.
  Dot(.), Spaces are not allowed in variable names so answer is option 1
• 5 years agoHelpfull: Yes(3) No(1)
• Ans:1
  Because variable name must start with _ or
  Alphabet
  . And spaces not allowed in variable name
• 6 years agoHelpfull: Yes(1) No(1)
• 4
  because no special characters are allowed
• 6 years agoHelpfull: Yes(1) No(1)
• ans-option 2
  because, var name should no starts with numerics and var name doesnot accepts space so 3 variable names in the list are invalid
• 6 years agoHelpfull: Yes(1) No(0)
• a variable name should not start with a capital letter,number or any symbol except undercore and space is not allowed
  hence,the answer is 5
• 4 years agoHelpfull: Yes(1) No(1)
• Ans will be 1.5
• 5 years agoHelpfull: Yes(0) No(2)
• answer: Option 2. 3
  because variable names can be started only with alphabets or underscores.
  There should be no spaces present in between the variable name
• 5 years agoHelpfull: Yes(0) No(1)
• two variable declarations are ok.Because of only these two follow variable name declaration rules
• 5 years agoHelpfull: Yes(0) No(0)
• i think its 3
• 4 years agoHelpfull: Yes(0) No(0)
• Characters Allowed :
  Underscore(_)
  Capital Letters ( A – Z )
  Small Letters ( a – z )
  Digits ( 0 – 9 )
  Blanks & Commas are not allowed
  No Special Symbols other than underscore(_) are allowed
  First Character should be alphabet or Underscore
  Variable name Should not be Reserved Word.
• 4 years agoHelpfull: Yes(0) No(0)
• ans- option 1
• 4 years agoHelpfull: Yes(0) No(0)
• 4 are invalid
  first.name
  midname._num 93num
  last name nUMBER
  4321
  these are against the string rules. A string does not have space or (.) or number in it
• 2 years agoHelpfull: Yes(0) No(0)