The presentation uses E or e to denote the exponent part of a real constant written in exponential notation.
Programming in C MCQ - Constants, Variables and Data Types
Exponential notation expresses a real value using a mantissa together with an exponent. The exponent indicates the power used to scale the mantissa.
3E4 is a valid exponential-form real constant in the examples. It provides a mantissa and an integer exponent in the expected notation.
A character constant in C is written within single quotation marks, for example 'C'. Double quotation marks are used for string literals.
'C' represents a single character enclosed in single quotes, which is the form used for a character constant in C.
