slice
len
cap

Slice

You can view a slice to be just a very flexible array.
Actually it is a slice of an array. A view on a section of the array.
len - length
cal - capacity

The only difference you can see when we create a slice is that we don't explicitely say its size and we also don't put the 3 dots ... in the square bracket.

There is also a cap function that returns the size of the underlying array.

We can access the elements of a slice using the postfix square-bracket notation. Just as with arrays.

examples/slice/slice.go

package main

import (
    "fmt"
)

func main() {
    var dwarfs = []string{"Doc", "Grumpy", "Happy", "Sleepy", "Bashful", "Sneezy", "Dopey"}

    fmt.Println(dwarfs)
    fmt.Println(dwarfs[0])
    fmt.Println(len(dwarfs))
    fmt.Println(cap(dwarfs))
}

[Doc Grumpy Happy Sleepy Bashful Sneezy Dopey]
Doc
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