let arr1=['a','b','c'];
let arr2=[1,2,3];
let arr3 = []
for(var i = 0;i<arr1.length;i++){arr3.push([arr1[i],arr2[i]])
}
console.log(arr3);//[['a', 1],['b', 2],['c', 3]]
let arr1=['a','b','c'];
let arr2=[1,2,3];
let arr3 = []
for(var i = 0;i<arr1.length;i++){arr3.push([arr1[i],arr2[i]])
}
console.log(arr3);//[['a', 1],['b', 2],['c', 3]]