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Capacity of slice in Go

  1. Forget Code
  2. Go
  3. Capacity of slice
cap method can be used to get capacity of slice.

Syntax 
cap(sliceName)


Example : Capacity of a slice before and after using append 
package main

import "fmt"

func main() {

    personNameSlice := make([]string, 10)

    fmt.Printf("%d \n", cap(personNameSlice))

    personNameSlice = append(personNameSlice, "hello")

    fmt.Printf("%d \n", cap(personNameSlice))

}