There are two ways to traverse an array: 1. Use a for loop statement to traverse the array, the syntax is "for i :=0;i

The operating environment of this tutorial: Windows 7 system, GO version 1.18, Dell G3 computer.

There are two ways to traverse arrays in Go language, namely: through for loop and through for range loop.

for loop traverses the array

The curly braces at the beginning of the loop body of the for loop in Go language must be written on the same line as for. This is not allowed. Separate line breaks, similar to curly braces in if statements.

Syntax

for i := 0; i < len(arr); i++ {
    //arr[i]
}

Instructions:

We use the len function to get the number of array elements, and then get each element through a for loop and index. The value of an array element.

Example: for loop array traversal

We can traverse the array in the form of for loop plus index

package main
import (
	"fmt"
)
func main() {
	//我们可以通过 for循环加索引的形式遍历数组
	var arr = [10]int{1,2,3,4,5,6,7,8,9,10}
	for i := 0; i < len(arr); i++ {
		fmt.Println(arr[i])
	}
}

for range loop traverses the array

The key-value for loop of Go language uses the syntax form of for range, which can be used to traverse the array.

Syntax

for index, value := range arr{
}

Explanation:

Traverse the array elements in the form of for range, index is the index of the array, value is the index of the array The value of the array corresponding to index. If we don't need the index or value, we can ignore it in the form of _.

Example: for range loop array traversal

package main
import (
	"fmt"
)
func main() {
	//我们可以通过 for range循环的形式遍历数组
	var arr = [10]int{1,2,3,4,5,6,7,8,9,10}
	for index, value := range arr{
		fmt.Println("Index =", index, "Value =", value)
	}
}

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