go array 学习笔记

go array note

In Go, an array is a numbered sequence of elements of a specific length.

---

	var a [5]int		// create an array a that will hold exactly 5 ints. 

	fmt.Println("len:", len(a))	//Use builtin len returns the length of an array.

	b := [5]int{1, 2, 3, 4, 5}	//Use this syntax to declare and initialize an array in one line.

Array types are one-dimensional, but you can compose types to build multi-dimensional data structures.

    var twoD [2][3]int
    for i := 0; i < 2; i++ {
        for j := 0; j < 3; j++ {
            twoD[i][j] = i + j
        }
    }
    fmt.Println("2d: ", twoD)
	}

You’ll see slices much more often than arrays in typical Go. We’ll look at slices next.