Junior — Middle

What happens in a program if an int variable reaches its maximum value and overflows during execution?

sobes.tech AI

Answer from AI

In Go, the int type is a signed integer type whose size depends on the architecture (usually 32 or 64 bits). If a variable of type int reaches its maximum value and overflows:

The value will "wrap around" and become the minimum possible negative number for that type.
Overflow does not cause an error or exception at runtime.

For example, for a 32-bit int, the maximum value is 2,147,483,647. Increasing it by 1 will make it -2,147,483,648.

Example:

package main
import "fmt"

func main() {
    var x int32 = 2147483647 // max value for int32
    fmt.Println(x)           // 2147483647
    x = x + 1
    fmt.Println(x)           // -2147483648 (overflow)
}

Therefore, when working with integers, it is important to consider the possibility of overflow and to use types with a larger range or additional checks.

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