Question

Which of the following statements is false?

a. Variables of type float represent single-precision floating-point numbers and have seven significant digits
b. Java provides two primitive types for storing floating-point numbers in memory—float and double
c. A floating-point number is a number with a decimal point
d. Variables of type double represent double-precision floating-point numbers; these require twice as much memory as float variables and provide 14 significant digits

Answer 1

The false statement is that a floating-point number is simply a number with a decimal point. Floating-point numbers represent real numbers in a way that can express very large or very small values with a certain precision, and they might be represented in scientific notation without a visible decimal point.

Step-by-step explanation:

The statement which is false is: "c. A floating-point number is a number with a decimal point." While floating-point numbers can indeed have decimal points, this is not a complete description. Floating-point numbers represent real numbers using a system to maintain a certain degree of precision, which can also represent very large or very small numbers that may not necessarily have a visible decimal point when written in scientific notation.

Points to note about floating-point numbers in Java:

• Variables of type float represent single-precision floating-point numbers and have approximately seven significant digits.
• Java provides two primitive types for storing floating-point numbers: float and double.
• Variables of type double represent double-precision floating-point numbers; these require twice as much memory as float variables and provide about 15-16 significant digits.