count the number of elements in an array javascript
var arr = [10,20,30,40,50]; //An Array is defined with 5 instances
var len= arr.length; //Now arr.length returns 5.Basically, len=5.
console.log(len); //gives 5
console.log(arr.length); //also gives 5use .map to count length of each element in an array
var lengths = chars.map(function(word){
return word.length
})use .map to count length of each element in an array
var words = ['Hello', 'world'];
var lengths = words.map(function(word) {
return word + ' = ' + word.length;
});
console.log(lengths);Copyright © 2021 Codeinu
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