[daily exercises] 1 Sum of two numbers

Sum of two numbers

Title Description ： Given an array of integers nums And an integer target value target, Please find... In the array And is the target value target the Two Integers , And return their array subscripts .

 Example 1：
 Input ：nums = [2,7,11,15], target = 9
 Output ：[0,1]
 explain ： because  nums[0] + nums[1] == 9 , return  [0, 1] .
 Example 2：
 Input ：nums = [3,2,4], target = 6
 Output ：[1,2]
 Example 3：
 Input ：nums = [3,3], target = 6
 Output ：[0,1]

Their thinking ： Set a primitive array containing two elements , Double traversal , Assign the index obtained by traversal to the two elements in the array in turn , Finally, return the array .

class Solution {
    
    func twoSum(_ nums: [Int], _ target: Int) -> [Int] {
    
        var tagrgetNum : [Int] = [0,0]
        for i in 0..<nums.count {
    
            for j in 0..<i {
    
                if nums[i] + nums[j] == target {
    
                    tagrgetNum[0] = i
                    tagrgetNum[1] = j 
                }
            }
        }
    return tagrgetNum 
    }
}