export function sumEven(arr=[]){
    let soma = 0
    if (arr.length == 0){
        soma = 0
        
    }
    else if (arr.length == 1 && arr[0] ==1){
        soma = 1
    }
    else{
        for (let i = 0; i < arr.length; i++){
            if (arr[i] % 2 == 0){
                soma += arr[i]
            } 
        }
    }
    
    return soma
}
console.log(sumEven([]));
console.log(sumEven([1]));
console.log(sumEven([1, 2]));
console.log(sumEven([1, 2, 3]));
console.log(sumEven([1, 2, 3, 4]));
console.log(sumEven([1, 2, 3, 4, 5]));
console.log(sumEven([4, 6, 12, 5]));
console.log(sumEven([9, 234, 312, 999, 21, 2311]));
console.log(sumEven([533, 234, 23423, 32, 48876]));
console.log(sumEven([-1, 5, -10, -45]));
console.log(sumEven([-2, -7, -31]));
console.log(sumEven([-2, 20, -31]));