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var cubes = [["string", "string"], ["string", "string"]];
for(var i = 0; i < cubes.length; i++) {
for(var j = 0; j < cubes[i].length; j++) {
console.log(cubes[i][j]);
}
}
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let studentsData = [['Jack', 24], ['Sara', 23],];
for (let i of studentsData) {
for (let j of i) {
console.log(j);
}
}