Question

How to convert long to int in Go

Answer 1

package main

import (
    "fmt"
    "math"
)

func main() {
    var bigNumber int64 = 1802578901
    var smallNumber int32 = int32(bigNumber) // May cause overflow
    fmt.Println(smallNumber)

    // Safe check
    bigNumber = 1989802578901
    if bigNumber <= math.MaxInt32 && bigNumber >= math.MinInt32 {
        smallNumber = int32(bigNumber)
    } else {
        fmt.Println("Overflow detected!")
    }
}



/*
run:

1802578901
Overflow detected!

*/

 

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