function sumOfTwo(nums1, nums2, value) {
    //set return variable, default to false.
    let sumFound = false;
    
    //loop through first array and find the difference required to get the value
    for (let i = 0; i < nums1.length; i++){
        //get the value needed to achieve 'value' with current item
        let diff = value - nums1[i];
        //check if the needed difference is included in the second array
        if(nums2.includes(diff)){
            //if the value is there, at least one sum exists, return
            sumFound = true;
            break;
        }
    }
    
    return sumFound;
}



/**
* Test Suite 
*/
describe('sumOfTwo()', () => {
    it('returns true if a value can be found that by adding one number from each list', () => {
        // arrange
        const nums1 = [1, 2, 3];
        const nums2 = [10, 20, 30, 40];
        const value = 42;
        
        // act
        const result = sumOfTwo(nums1, nums2, value);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(true);
    });
});

describe('sumOfTwo()', () => {
    it('returns true if a value can be found that by adding one number from each list', () => {
        // arrange
        const nums1 = [1, 2, 3];
        const nums2 = [10, 20, 30, 45];
        const value = 42;
        
        // act
        const result = sumOfTwo(nums1, nums2, value);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(false);
    });
});