Golang React JS Technology Blog

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
Most Helpful This Week
How to find length of Map in Go? Simple function with return value in Golang How to check lowercase characters in a string in Golang? How can I convert a string variable into Boolean, Integer or Float type in Golang? How to check pointer or interface is nil? How to use function from another file golang?