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43 lines
1013 B
Go
43 lines
1013 B
Go
// In Go, an _array_ is a numbered sequence of elements of a
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// specific length.
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package main
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import "fmt"
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func main() {
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// Here we create an array `a` that will hold exactly
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// 5 `int`s. The type of elements and length are both
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// part of the array's type. By default an array is
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// zero-valued, which for `int`s means `0`s.
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var a [5]int
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fmt.Println("emp:", a)
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// We can set a value at an index using the
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// `array[index] = value` syntax, and get a value with
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// `array[index]`.
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a[4] = 100
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fmt.Println("set:", a)
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fmt.Println("get:", a[4])
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// The builtin `len` returns the length of an array.
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fmt.Println("len:", len(a))
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// Use this syntax to declare and initialize an array
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// in one line.
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b := [5]int{1, 2, 3, 4, 5}
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fmt.Println("dcl:", b)
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// Array types are one-dimensional, but you can
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// compose types to build multi-dimensional data
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// structures.
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var twoD [2][3]int
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for i := 0; i < 2; i++ {
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for j := 0; j < 3; j++ {
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twoD[i][j] = i + j
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}
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}
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fmt.Println("2d: ", twoD)
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}
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