52. Go - Type Assertions for Interfaces

Assertion allows accessing exact types from an interface.

Using parenthesis and the type inside.


Example:

package main

import "fmt"

func main() {
    var jar interface{} = 2000

    x := jar.(int)

    fmt.Println(x)

    y, err := jar.(string)
    if err {
        fmt.Println("STRING FOUND: ", y)
    } else {
        fmt.Println("STRING NOT FOUND")
    }
}

// using double variables allow checking if the type exists in an interface.

// if true, else 

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