Find capacity of Channel, Pointer and Slice
The builtin Cap function is used to find the capacity of Channel, Pointer and Slice. There is no package need to import to use Cap function.
Example
package main
import "fmt"
func main() {
sliceEx := make([]string, 0, 10)
fmt.Printf("\nSlice: %d", cap(sliceEx))
channelEx := make(chan string, 5)
fmt.Printf("\nChannel: %d", cap(channelEx))
var pointerEx *[20]string
fmt.Printf("\nPointer: %d", cap(pointerEx))
}
Output
Slice: 10
Channel: 5
Pointer: 20