add numbers from array javascript code example

Example 1: adding numbers in an array javascript

console.log(
  [].reduce((a, b) => a + b)
)

Example 2: javascript sum of array

const sum = arr => arr.reduce((a, b) => a + b, 0);

Example 3: javascript sum array values

function getArraySum(a){
    var total=0;
    for(var i in a) { 
        total += a[i];
    }
    return total;
}

var payChecks = [123,155,134, 205, 105]; 
var weeklyPay= getArraySum(payChecks); //sums up to 722

Example 4: add numbers from array nodejs

//these are the values//
var values = [
	'1',
  	'2'
]
//makes a variable named total, adding together the values
var total = values[0] + values[1]

//prints out the variable named total
console.log(total);