There are different methods to sum the array this is very basic questions which comes up when starting with JavaScript. Below are the menthods which we can use to sum the numbers in the array.
The menthods include javascript sum array reduce method, javascript sum array foreach, javascript sum array of objects, javascript sum array for loop.
JavaScript sum array reduce()
var arr = [3, 4, 5, 6, 7];
var sum = arr.reduce(function(a, b){
return a + b;
}, 0);
console.log(“The sum of array is “+sum);
Output is The sum of array is 25
JavaScript sum array for loop
var array = [3, 4, 5, 6, 8];
var total=0;
for(var i in arr)
{
totalofnum += array [i];
}
console.log(“The sum of array is “+totalofnum);
Output is The sum of array is 26
JavaScript sum array of objects
var arr = [3, 4, 5, 6, 9];
var sum = 0;
for (var i = 0; i < arr .length; i++) {
sum += arr [i];
}
var sum = 0;
for (var i = 0; i < arr .length; i++) {
sum += arr [i];
}
console.log(“The sum of array is “+sum);
Output is The sum of array is 27
JavaScript sum array foreach
var sum = 0;
arra.forEach(function (e) {
sum += e;
});
console.log(sum);
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