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
Golang HTTP GET request with parameters How to use wildcard or a variable in our URL for complex routing? Dereferencing a pointer from another package How to check if a string contains a substring in Golang? Example: How to use ReadFull from IO Package in Golang? How to read names of all files and folders in current directory?