Home >Backend Development >Golang >What is golang array? How to implement summation
What is golang array? How to implement summation
- PHPzOriginal
- 2023-04-03 11:50:36610browse
1. Overview
Since the question is clearly about summing arrays, let’s first understand what an array is. An array is a data structure, which is a data model that consists of elements of the same type and is accessed through a subscript. In Golang, arrays are divided into fixed-length arrays and dynamic arrays (slices), and the arrays discussed in this article all refer to fixed-length arrays.
2. Definition and initialization of arrays
In Golang, define a fixed-length array, the syntax is as follows:
var arr [length]datatype
Among them, length represents the array Length, datatype represents the type of elements in the array. For example, declaring an array with a length of 5 and an element type of int can be written as follows:
var arr [5]int
There are three ways to initialize an array, namely:
- Initialization at declaration
var arr [5]int = [5]int{1, 2, 3, 4, 5}
- Omit length initialization
arr := [...]int{1, 2, 3, 4, 5}
Note: When the length is omitted, the compiler will automatically deduce the length based on the number of initialized elements.
- Initialization based on index
arr := [5]int{0: 1, 2: 3, 4: 5}
Where, the number represents the index of the array.
3. Array summation
The idea of array summation is very simple, which is to accumulate all elements in the array. Below is the code to implement array summation in two ways.
- for loop summation
var sum int
for i := 0; i < len(arr); i++ {
sum += arr[i]
}
- range loop summation
var sum int
for _, v := range arr {
sum += v
}
4. Complete sample code
package main
import (
"fmt"
)
func calc(arr [5]int) int {
var sum int
for i := 0; i < len(arr); i++ {
sum += arr[i]
}
return sum
}
func main() {
arr := [5]int{1, 2, 3, 4, 5}
sum := calc(arr)
fmt.Println(sum)
}
5. Summary
This article introduces the definition and initialization method of fixed-length arrays in Golang, and how to sum the arrays. Array summation is suitable for a variety of scenarios, such as accumulation of multiple similar variables, numerical calculations, etc. Proficiency in array summation methods can improve work efficiency.
The above is the detailed content of What is golang array? How to implement summation. For more information, please follow other related articles on the PHP Chinese website!