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Write a Golang program to reverse an array
Examples
- Input arr = [3, 5, 7, 9, 10, 4] => [4, 10, 9, 7, 5, 3]
- Input arr = [1, 2, 3, 4, 5] => [5, 4, 3, 2, 1]
Approach to solve this problem
- Step 1: Define a function that accepts an array.
- Step 2: Start iterating the input array.
- Step 3: Swap first element with last element of the given array.
- Step 4: Return array.
Program
package main
import "fmt"
func reverseArray(arr []int) []int{
for i, j := 0, len(arr)-1; i<j; i, j = i+1, j-1 {
arr[i], arr[j] = arr[j], arr[i]
}
return arr
}
func main(){
fmt.Println(reverseArray([]int{1, 2, 3, 4, 5}))
fmt.Println(reverseArray([]int{3, 5, 7, 2, 1}))
fmt.Println(reverseArray([]int{9, 8, 6, 1, 0}))
}Output
[5 4 3 2 1] [1 2 7 5 3] [0 1 6 8 9]
Updated on: 04-Feb-2021
2K+ Views
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