Question

How to find all pairs in an array that equal to a given sum in Dart

Answer 1

class MyClass
{
    static void findAllPairs(List<int>arr, int sum) {
        var found = false;
        for (var i = 0; i < arr.length - 1; i++) {
            for (var j = i + 1; j < arr.length; j++) {
                if (arr[i] + arr[j] == sum) {
                    print("arr[" + (i).toString() + "](" + (arr[i]).toString() + 
                          ") + arr[" + (j).toString() + "](" + (arr[j]).toString() + ")");
                    found = true;
                }
            }
        }
        if (!found) {
            print("Pair not found");
        }
    }
    static void main()
    {
        List<int> arr = [2, 4, 1, 5, 6, 8, 1];
        
        var sum = 10;
        
        MyClass.findAllPairs(arr, sum);
    }
}

void main() {
	MyClass.main();
}





/*
run:

arr[0](2) + arr[5](8)
arr[1](4) + arr[4](6)

*/

 

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