Value
the value of a variable is the contents of the memory cell or cells associated with the variable
the address of a variable is sometimes called its l-value, and the value is sometimes called its r-value (the left and right side of an assignment statement)
when the variable name is followed with '=' and then a value, an initial value can be given to the variable e.g.
char answer = 'Y'; /* reply is 'y' or 'n' */
double epsilon = 1e-5; /* smallest step */