Go language: Get number of elements in the slice

‘len’ function returns number of elements in the slice.

App.go

package main

import "fmt"

func main() {
    data := make([]int, 5, 20)

    fmt.Println("Length : ", len(data))
    fmt.Println("Capacity : ", cap(data))
    fmt.Println("Data : ", data)
}

Output

Length :  5

Capacity :  20

[0 0 0 0 0]

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