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<!DOCTYPE html>
<html>
<head>
<title>Set Variable Before Loop</title>
</head>
<body>
</body>
</html>
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css
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body {
}
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js
js
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'use strict';
const countOnes = (arr) => {
let i = 0;
let j = 0;
let count = 0;
for(; i < arr.length; i++) {
for(; j < arr[i].length; j++) {
if(arr[i][j] == 1) {
count = count + 1;
}
}
j = 0;// reset the inner loop variable
}
console.log(count);
};
countOnes([
[1, 0],
[0, 0]
]); //➞ 1
countOnes([
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