What does double store?

What does double store?

• A. Decimal numbers
• B. Decimal numbers with greater precision.
• C. Boolean values.
• D. Very large numbers.

Answer: (B)

Double stores numbers with fractional parts using a format that provides double precision. That means it uses more bits to represent the value, giving you greater precision and a wider range than a single-precision type. In most languages this is 64 bits total, arranged to hold a sign, an exponent, and a mantissa, which yields about 15–17 decimal digits of precision and a very large range. Because it’s a binary representation, some decimals can’t be stored exactly, but you gain the ability to work with very precise values and very large or very small magnitudes. This type is intended for decimal values with fractional parts where precision matters, not for booleans or just arbitrarily large integers.

Double stores numbers with fractional parts using a format that provides double precision. That means it uses more bits to represent the value, giving you greater precision and a wider range than a single-precision type. In most languages this is 64 bits total, arranged to hold a sign, an exponent, and a mantissa, which yields about 15–17 decimal digits of precision and a very large range. Because it’s a binary representation, some decimals can’t be stored exactly, but you gain the ability to work with very precise values and very large or very small magnitudes. This type is intended for decimal values with fractional parts where precision matters, not for booleans or just arbitrarily large integers.