# Best answer: What’s the difference between double and float in Java?

Contents

Double takes more space but more precise during computation and float takes less space but less precise. According to the IEEE standards, float is a 32 bit representation of a real number while double is a 64 bit representation. In Java programs we normally mostly see the use of double data type.

## What is difference between float and double?

Though Float and Double both of them are used for assigning real (or decimal) values in programming there is a major difference between these two data types.

Difference Between Float and Double Data Types.

Float Double
Float takes 4 bytes for storage. Double takes 8 bytes for storage.

## What is difference between float and double with example?

Difference between float and double in C/C++

double has 2x more precision then float. float is a 32 bit IEEE 754 single precision Floating Point Number1 bit for the sign, (8 bits for the exponent, and 23* for the value), i.e. float has 7 decimal digits of precision.

## Is 2.5 float or double?

When an integer is not an integer. C++ assumes that a number followed by a decimal point is a floating-point constant. Thus it assumes that 2.5 is a floating point. This decimal-point rule is true even if the value to the right of the decimal point is zero.

## Should I use float or double Java?

You should use double instead of float for precise calculations, and float instead of double when using less accurate calculations. Float contains only decimal numbers, but double contains an IEEE754 double-precision floating point number, making it easier to contain and computate numbers more accurately.

## Why we use double data type?

Double is more precise than float and can store 64 bits, double of the number of bits float can store. Double is more precise and for storing large numbers, we prefer double over float. For example, to store the annual salary of the CEO of a company, double will be a more accurate choice.

## What is a double value?

The double variable can hold very large (or small) numbers. The maximum and minimum values are 17 followed by 307 zeros. The double variable is also used to hold floating point values. A floating point value is one like 8.7, 12.5, 10.1. In other words, it has a “point something” at the end.

## What is the difference between float and float?

Float is an object; float is a primitive. Same relationship as Integer and int , Double and double , Long and long . float can be converted to Float by autoboxing, e.g.

## Is float a double?

When you try to do the comparison the float number is implicitly upconverted to a double. The double data type can accurately represent the contents of the float, so the comparison yields false. Generally you shouldn’t compare floats to floats, doubles to doubles, or floats to doubles using == .

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## What is double in C?

A double is a data type in C language that stores high-precision floating-point data or numbers in computer memory. It is called double data type because it can hold the double size of data compared to the float data type. A double has 8 bytes, which is equal to 64 bits in size.

## How do you declare a float?

You can define a variable as a float and assign a value to it in a single declaration. For example: float age = 10.5; In this example, the variable named age would be defined as a float and assigned the value of 10.5.

## Is 99.9 float or double?

Solution(By Examveda Team)

floating-point numbers are by default of type double. 99.9 is a double not a float.

## Can we add float and double in Java?

A float can have precision up to around 5 or 6 float point numbers, and a double can have precision up to around 10 floating point numbers. Basically… a double can store a decimal better than a float … but takes up more space. To answer your question, you can add a float to a double and vice versa.

## Why is double not precise?

It shows that after rounding double give the same result as BigDecimal up to precision 16. The result of floating point number is not exact, which makes them unsuitable for any financial calculation which requires exact result and not approximation. 