swap without temp variable

package main

import (
    "fmt"
)

func main() {
    
    first := 1
    second := 2
    
    first = first-second // -1
    second = first+second // 1
    first = second-first // 2
    fmt.Println("First number :",first)
    fmt.Println("Second number :",second)
    
}

Go

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