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# What is the use of double in C?

## What is the use of double in C?

Double is also a datatype which is used to represent the floating point numbers. It is a 64-bit IEEE 754 double precision floating point number for the value. It has 15 decimal digits of precision.

## What is the difference between a double and a float in C++?

What’s the difference ? 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 23for the value), i.e. float has 7 decimal digits of precision

## When would you use a float data type?

7 Answers. Floating point numbers should be used for what they were designed for: computations where what you want is a fixed precision, and you only care that your answer is accurate to within a certain tolerance. If you need an exact answer in all cases, you’re best using something else

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## Why do we use float in Java?

The Java float keyword is a primitive data type. It is a single-precision 32-bit IEEE 754 floating point. It is used to declare the variables and methods. It represents the fractional numbers.

## What is double precision value?

Double precision is an inexact, variable-precision numeric type. In other words, some values cannot be represented exactly and are stored as approximations.

## What is double precision in SQL?

DOUBLE PRECISION The REAL data type accepts approximate numeric values, up to a precision of 64. No parameters are required when declaring a DOUBLE PRECISION data type. If you attempt to assign a value with a precision greater than 64 an error is raised. Examples. DOUBLE PRECISION.

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double data type

## What is data type float?

The FLOAT data type stores double-precision floating-point numbers with up to 17 significant digits. FLOAT corresponds to IEEE 4-byte floating-point, and to the double data type in C. The range of values for the FLOAT data type is the same as the range of the C double data type on your computer.