Sorry, but I am not able to understand what exactly math.Exp is doing in following code block:

package main

import (
    "fmt"
    "math"
)

func main() {
    for x := 0; x < 8; x++ {
        fmt.Printf("x = %f ex = %8.3f
", float64(x), math.Exp(float64(x)))
    }
}

The output of the above program is:

x = 0.000000 ex =    1.000
x = 1.000000 ex =    2.718
x = 2.000000 ex =    7.389
x = 3.000000 ex =   20.086
x = 4.000000 ex =   54.598
x = 5.000000 ex =  148.413
x = 6.000000 ex =  403.429
x = 7.000000 ex = 1096.633

And, I am not able to understand what exactly is math.Exp function is doing internally and converting float64(x) to respective values as in the output. I have read the go's official documentation, which says as below:

Exp returns e**x, the base-e exponential of x.

Reading which I am not very clear of the purpose and mechanism of math.Exp function.

I am actually interested in what binary/mathematical operation is going under the hood.

Math.round(-4.6)和Math.round(-4.5)结果为啥不一样呢？

张依冉上课吃猪蹄

2个回复