2dimArraySumEvenElements.js

let nums = [
	[1,2,3],
	[4,5,6]
]


let sum = 0;

for(let i = 0; i<nums.length; i++){
	for(let j=0; j<nums[i].length; j++){
		if(nums[i][j]%2===0){
			sum += nums[i][j];
		}
	}
}

console.log(`sum= ${sum}`);