How to perform floating-point division operation in golang (two ways)

In golang, there are two ways to divide floating point numbers: regular division operation and precise division operation. Regular division operations use the operator "/", while exact division operations use the "Quo" function from the "math/big" package.

Regular division operation:

In golang, you can use the operator "/" to perform regular floating point division operations. For example, the following code shows how to divide two floating point numbers:

package main

import (
    "fmt"
)

func main() {
    a := 3.0
    b := 2.0
    result := a / b
    fmt.Println(result)
}

Output result:

1.5

In this example, the variables a and b are initialized to 3.0 and 2.0 respectively, and They divide. Finally, the result is printed to the console.

Accurate division operation:

In some situations where high-precision calculations are required, the division operation of floating point numbers may be affected by rounding errors, resulting in inaccurate results. In order to solve this problem, golang provides a high-precision calculation library-"math/big".

The "math/big" library provides more precise division operations. We can achieve high-precision division calculation of two floating point numbers by using the "Quo" function in the "math/big" library. For example, here is a sample program that uses the "Quo" function for high-precision division:

package main

import (
    "fmt"
    "math/big"
)

func main() {

    a := big.NewFloat(3)
    b := big.NewFloat(2)
    result, _ := new(big.Float).Quo(a, b).Float64()
    fmt.Println(result)

}

Output result:

1.5

In this example, we created a Two floating point numbers. We then use the "Quo" function to perform exact division, and the result returned is a high-precision floating point number. Finally, we convert the high-precision floating point number to a standard floating point number and output the result.

Conclusion:

In short, there are two ways of floating point division operation in golang: regular division operation and precise division operation. Conventional division operations are suitable for most cases, but in some situations where high-precision calculations are required, precise division operations need to be used. In this case, the "Quo" function in the "math/big" package can be used for high-precision calculations. .

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