basic logics

basicLogic.js

// factorial
function factorial(number) {
   var product = 1;
   for (var i = 1; i <= number; i++) {
      product *= i;
   }
   return product;
}

// factorial recursive
function factorial(number) {
   if (number == 1) {
      return number;
   }
   else {
      return number * factorial(number-1);
   }
}

// min element index in Array
function minElementIndex(intArr){
    var index=0;
    temp =intArr[0];
    for(var i=0;i<intArr.length;i++){
        
        if(intArr[i]< temp){
            temp=intArr[i];
            index = i;
        }
    }
    return index;
}

// find all divisor of a number
function getDivisors(n){
    var a1=[];
    for(var i= 1; i<=n;i++){
        if(n%i===0){
            a1.push(i);
        }
    }
    return a1;
}

// adding element in the 1st position of array
var nums = [2,3,4,5];
var newnum = 1;
var N = nums.length;
for (var i = N; i >= 0; --i) {
   nums[i] = nums[i-1];
}
nums[0] = newnum;
console.log(nums); // 1,2,3,4,5


// delete 1st position element of array
var nums = [9,1,2,3,4,5];
console.log(nums);
for (var i = 0; i < nums.length; ++i) {
   nums[i] = nums[i+1];
}
console.log(nums); // 1,2,3,4,5,