在go lang中，为什么是7？ 断言（5 ^ 2 == 7）

in go lang, why this is 7 ?

assert(5^2 == 7)

so strange. I tried to google it. but google does not work well with special characters. Thanks.

The ^ operator is the XOR (exclusive OR), applied bitwise if operands are numbers.

5 = 101b // in binary, but Go doesn't have binary literals
2 = 010b
XOR:
7 = 111b

It is an Arithmetic operators:

^    bitwise XOR            integers

You can see it on this Bitwise Calculator

Result in binary    111

As others already described, ^ is an operator for XOR. If you want to calculate the square of 5, you can use math.Pow() function.

package main

import (
    "fmt"
    "math"
)

func main() {
    fmt.Printf("square of 5 = %f
", math.Pow(5,2))
}