0.7
9.3el2
27,512
12345678 E. None of the above
Answer is Right!
Answer is Wrong!
The correct answer is: B. 9.3el2
A constant is a value that does not change during the execution of a program. It can be a number, a string, or a character.
A valid constant is a constant that follows the rules of the programming language. In C++, a valid constant must be:
- A number: A number can be an integer, a floating-point number, or a complex number.
- A string: A string is a sequence of characters enclosed in double quotes.
- A character: A character is a single letter, digit, or symbol.
The constant 9.3el2 is not a valid constant because it does not follow the rules of C++. The exponent must be a whole number, but 2 is not a whole number.
The other options are all valid constants.
- 0.7 is a valid number.
- 27,512 is a valid integer.
- 12345678 is a valid integer.