Question and Answer
Q Why do characters have their unique numeric values?
Ans Characters are stored in computers in the form of bits. The combinations of bits can be used to represent different numeric values. A character has to have a unique numeric value in order to distinguish itself. Many computer systems support the ASCII character set, which contains a set of unique numeric values for up to 256 characters.
Q How can you declare two character variables?
Ans There are two ways to do the declaration. The first one is
…char variable-name1, variable-name2;
char variable-name1;
char variable-name2;
Q What are %c, %d, and %f?
Ans These are format specifiers. %c is used to obtain the character format; %d is for the integer format; %f is for the floating-point format. %c, %d, and %f are often used with C functions such as printf().
Q What are the main differences between the int data type (integer) and the float data type (floating-point)?
Ans First, an integer does not contain any fraction parts, but a floating-point number does. A floating-point number must have a decimal point. In C, the float data type takes more bits than the int data type. In other words, the float data type has a larger range of numeric values than the int data type. Also, the integer division truncates the fraction part. For instance, the integer division of 16/10 produces a result of 1, not 1.6.
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