# Quando se usa double?

** What is an example of a BigDecimal **

For example, the BigDecimal 3.14 has the unscaled value of 314 and the scale of 2. We use BigDecimal for high-precision arithmetic. We also use it for calculations requiring control over scale and rounding off behavior. One such example is calculations involving financial transactions.

** What is the difference between a big decimal and a double **

A BigDecimal is an exact way of representing numbers. A Double has a certain precision. Working with doubles of various magnitudes (say d1=1000.0 and d2=0.001 ) could result in the 0.001 being dropped altogether when summing as the difference in magnitude is so large. With BigDecimal this would not happen.

Cached

** Why BigDecimal is better than double **

BigDecimal reduces the chances of calculation errors. On double numbers, the BigDecimal class provides arithmetic, scale management, rounding, comparison, format conversion, and hashing functions. It compensates for the time complexity by handling large and small floating-point integers with exceptional precision.

** Why use BigDecimal for currency **

BigDecimal represents a signed decimal number of arbitrary precision with an associated scale. BigDecimal provides full control over the precision and rounding of the number value.

** What is BigDecimal used for **

The BigDecimal class provides operations for arithmetic, scale manipulation, rounding, comparison, hashing, and format conversion. The toString() method provides a canonical representation of a BigDecimal .

** What are the uses of BigDecimal **

The BigDecimal class provides operations on double numbers for arithmetic, scale handling, rounding, comparison, format conversion and hashing. It can handle very large and very small floating point numbers with great precision but compensating with the time complexity a bit.

** What is an example of long vs double **

Example. Additionally, long var1 = 1000000L is an example for long data type while double var2 = 10.3 or double var2=10.3d is an example for double data type.

** Which is better double or decimal **

Double is more accurate than Float but less accurate than Decimal. Decimal is more accurate than Float and Double.

** What are the disadvantages of BigDecimal **

Like double has few disadvantages, BigDecimal class main disadvantage is it slower than double. So if we have a system where low latency is crucial than the decimal part of a number, we should go for double.

** Should I use double or decimal **

If numbers must add up correctly or balance, use decimal. This includes any financial storage or calculations, scores, or other numbers that people might do by hand. If the exact value of numbers is not important, use double for speed.

** Should I use decimal or double for money **

For money, always decimal. It's why it was created. If numbers must add up correctly or balance, use decimal. This includes any financial storage or calculations, scores, or other numbers that people might do by hand.

** Should I use BigDecimal or double for money **

The main disadvantage is BigDecimal is slower than double. So if we have a system where low latency is crucial than the decimal part of a number, we should go for double. But in financial or any other systems where each digit of decimal part are important, BigDecimal should be chosen over double/float.

** What is the default BigDecimal **

By default, BigDecimal numbers have “unlimited” precision. In fact, the maximum unscaled value is equal to 2^Integer.

** What is double in Java with example **

The Java double keyword is a primitive data type. It is a double-precision 64-bit IEEE 754 floating point. It is used to declare the variables and methods. It generally represents the decimal numbers.

** What does BigDecimal mean **

A BigDecimal consists of an arbitrary precision integer unscaled value and a 32-bit integer scale. If zero or positive, the scale is the number of digits to the right of the decimal point. If negative, the unscaled value of the number is multiplied by ten to the power of the negation of the scale.

** What are the drawbacks of BigDecimal **

Like double has few disadvantages, BigDecimal class main disadvantage is it slower than double. So if we have a system where low latency is crucial than the decimal part of a number, we should go for double.

** Which is bigger double or long **

Int64 (aka long): A signed integer with 64 bits (8 bytes) of space available. Single (aka float): A 32-bit floating point number. Double (aka double): A 64-bit floating-point number. Decimal (aka decimal): A 128-bit floating-point number with a higher precision and a smaller range than Single or Double.

** Which is better long or double **

Long is for integer numbers. Double is for real numbers (i.e. numbers which have decimal points in them!). (They can have up to around 12 significant figures.) The String type is for character strings (like names etc).

** How accurate is double decimal place **

Double precision numbers are accurate up to sixteen decimal places but after calculations have been done there may be some rounding errors to account for. In theory this should affect no more than the last significant digit but in practice it is safer to rely upon fewer decimal places.

** What is more accurate than double **

Big Decimal

NET and Java also have Decimal/BigDecimal class that has higher precision than double. For more accurate calculations like in financial and banking applications, Decimal is used because it further reduces rounding errors.

** Is BigDecimal more accurate than double **

A BigDecimal is an accurate way of expressing numbers. A Double has a reliable accuracy. Going with doubles of various magnitudes (say d1=1000.0 and d2=0.001) could occur in the 0.001 being dropped collectively when summing as the variation in magnitude is so large. With BigDecimal this would not occur.

** What is double and decimal **

The fundamental difference is that the double is a base 2 fraction, whereas a decimal is a base 10 fraction. double stores the number 0.5 as 0.1, 1 as 1.0, 1.25 as 1.01, 1.875 as 1.111, etc. decimal stores 0.1 as 0.1, 0.2 as 0.2, etc.

** Does double mean decimal **

A double has 15 decimal digits of precision and occupies a total of 64 bits . Below is example for further clarification.

** Can I use double for money **

All floating point values that can represent a currency amount (in dollars and cents) cannot be stored exactly as it is in the memory. So, if we want to store 0.1 dollars (10 cents), float/double can not store it as it is.

** What is the best data type for money **

The decimal type is a 128-bit data type suitable for financial and monetary calculations. The decimal type can represent values ranging from 1.0 * 10^-28 to approximately 7.9 * 10^28 with 28-29 significant digits. To initialize a decimal variable, use the suffix m or M.