If I have an array with variable length like var arr = [1,3,4,0];, how can I concatenate all the elements to form a single number such as var number = 1340;? This concatenated number should be able to undergo various operations. The number of elements in the array may vary.
Utilize the Array.prototype.join() method, along with the parseInt() function to convert a string into a number:
parseInt([1,3,4,0].join('')); // 1340
Exploring the capabilities of the Array#reduce method
console.log(
[1, 3, 4, 0].reduce(function(sum, n, i) {
return sum * 10 + n;
})
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