soma de todos os números em um JavaScript de matriz
const arrSum = arr => arr.reduce((a,b) => a + b, 0)
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const arrSum = arr => arr.reduce((a,b) => a + b, 0)console.log(
[1, 2, 3, 4].reduce((a, b) => a + b, 0)
)
console.log(
[].reduce((a, b) => a + b, 0)
)function addSum(array) { // call the function with your array parameter
let solution = 0
for (let x = 0 ; x < array.length;x++) { // for loop
solution = solution + array[x]
}
return solution
}function addArrayNums(arr) {
let total = 0;
for (let i in arr) {
total += arr[i];
}
return total;
}