How do we declare more than one variable?

Variables of the same type may be declared in the same statement. However, each must be separated from the others by a comma; for example, the statement

float expense, income;

declares the variables expense and income to be of the float (which must be typed in lower case) type. Float type data contain a decimal point with or without a fraction. For example, 1..1.0, and 0.6 are float type data. When data without a decimal point are assigned to a float type variable, the C compiler automatically places a decimal point after the last digit.