Merge pull request #152 from nsundriyal62/dsa_loop

adding loop content in dsa folder

content/batch/dsa/loops.mdx

@@ -4,6 +4,160 @@ description: Learn Loops in JavaScript
 ---
 
 <Callout>
+Want to improve this page? Raise an issue on [@github](https://github.com/FrontendFreaks/Official-Website).
+</Callout>
 
-Want to improve this page? Raise a issue on [@github](https://github.com/FrontendFreaks/Official-Website).
-</Callout>
+## What's on this section?
+
+- 🔄 Explore different types of loops in JavaScript.
+- 🔍 Understand the syntax and usage of each loop.
+- 💡 Learn how to control the flow of loops.
+- 🚀 Practice your knowledge through assignments related to loops.
+
+
+<Tabs defaultValue="learn">
+
+<TabsList>
+  <TabsTrigger value="learn">Learn</TabsTrigger>
+  <TabsTrigger value="assignment">Assignment</TabsTrigger>
+</TabsList>
+
+<TabsContent value="learn">
+     ## 📺 Watch Now
+
+
+<div className="w-full h-full">
+  <VideoPlayer src="https://youtu.be/MLVJWmG2iYI"/>
+
+  <Callout type="info">
+    We hope that you found the tutorial video helpful in understanding the loops in javascript, You can refer this notes 📝 for quick revision.
+  </Callout>
+
+  ## 📝 Study Notes
+### Question 1: Sum of all natural numbers from 1 to n
+
+```javascript
+function sumOfNaturalNumber(num){
+    let sum = 0;
+    for(let i=1; i<=num; i++){
+        sum = sum + i;
+    }
+    return sum;
+}
+
+console.log(sumOfNaturalNumber(5)); // 15
+console.log(sumOfNaturalNumber(10)); // 55
+console.log(sumOfNaturalNumber(8)); // 36
+```
+
+### Question 2: Sum of digits of a number
+
+```javascript
+function sumOfDigits(num){
+    let sum = 0;
+    while(num > 0){
+        sum += num%10;
+        num = Math.floor(num / 10);
+    }
+    return sum;
+}
+
+console.log(sumOfDigits(1287)); // 18
+```
+
+### Question 3: Count the number of digits of a number
+
+```javascript
+function countDigits(num){
+    num = Math.abs(num);
+    let count = 0;
+    do {
+        count++;
+        num = Math.floor(num / 10);
+    } while (num > 0);
+    return count;
+}
+
+console.log(countDigits(121)); // 3
+console.log(countDigits(-1211413131)); // 10
+```
+
+### Question 4: Check if a number is palindrome
+
+```javascript
+let isPalindrome = function(x) {
+    let copyNum = x, reverseNum = 0;
+
+    while(copyNum > 0){
+        const lastDigit = copyNum % 10;
+        reverseNum = reverseNum * 10 + lastDigit;
+        copyNum = Math.floor(copyNum / 10);
+    }
+
+    return x === reverseNum;
+};
+
+console.log(isPalindrome(121)); // true
+console.log(isPalindrome(1234)); // false
+```
+
+### Question 5: Find nth Fibonacci number
+The Fibonacci numbers, commonly denoted F(n) form a sequence, called the Fibonacci sequence, 
+such that each number is the sum of the two preceding ones, starting from 0 and 1.
+
+```javascript
+let fib = function(n) {
+    if(n < 2){
+        return n;
+    }
+
+    let prev = 0, curr = 1, next;
+    for(let i=2; i<= n; i++){
+        next = prev + curr;
+        prev = curr;
+        curr = next;
+    }
+    return next;
+};
+
+// Fibonacci Sequence: 0 1 1 2 3 5 8...
+console.log(fib(5)); // 5
+console.log(fib(10)); // 55
+```
+
+### Question 6: Missing Number in an Array
+Given an array nums containing n distinct numbers in the range [0, n], 
+return the only number in the range that is missing from the array.
+```javascript
+let missingNumber = function(nums) {
+    let sum = 0;
+    for(let i=0; i<nums.length; i++){
+        sum += nums[i];
+    }
+    return nums.length*(nums.length+1)/2 - sum;
+};
+
+// One Line Solution: 
+let missingNumber = (nums) => nums.length*(nums.length+1)/2 - nums.reduce((acc, num) => num + acc);
+
+console.log(missingNumber([3,0,1])); // 2
+console.log(missingNumber([9,6,4,2,3,5,7,0,1])); // 8
+```
+
+
+</div>
+
+</TabsContent>
+
+<TabsContent value="assignment">
+
+     ### 📌🔨 Practise Questions
+
+- [Count Odd Numbers in an Interval Range](https://leetcode.com/problems/count-odd-numbers-in-an-interval-range/)
+- [Fizz Buzz](https://leetcode.com/problems/fizz-buzz/)
+- [Power of Two](https://leetcode.com/problems/power-of-two/)
+- [Find Square root of a Number](https://leetcode.com/problems/sqrtx/)
+
+</TabsContent>
+
+</Tabs>