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 5javascript check how many times value in array
function f(array,value){
var n = 0;
for(i = 0; i < array.length; i++){
if(array[i] == value){n++}
}
return n;
}Copyright © 2021 Codeinu
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