diff --git a/dsa/Day53/index.js b/dsa/Day53/index.js
new file mode 100644
index 0000000..84675dd
--- /dev/null
+++ b/dsa/Day53/index.js
@@ -0,0 +1,96 @@
+var y; //Declaration variable y
+
+let x=2; // Declaration & intializing the varaiable x with value 2;
+
+const s=[];// not just declare the const variable.
+
+
+const array = new Array(); // intansiating array of Array class.
+
+const n = new Number(2)
+
+
+let arr = [];
+
+arr.push(2)
+arr.push(3)
+arr.unshift(2)
+console.log(arr)
+arr.shift()
+console.log(arr)
+
+
+
+arr[0] = 23;
+
+arr[2] = 43;
+
+console.log(arr)
+
+
+
+const fruits = new Array(2); // intial size to array
+
+console.log(fruits)
+
+const frt = new Array("Apple","Banana","PineApple"); // intial value to array
+
+console.log(frt)
+
+
+let arr = [2,3,4,5,6];
+
+
+for(let i=0;i<arr.length;i++){
+  
+  console.log(arr[i])
+}
+
+for(let i=arr.length-1;i>=0;i--){
+  
+  console.log(arr[i])
+}
+
+for(let i=3;i>=0;i--){
+  
+  console.log(arr[i])
+}
+
+for(let i=parseInt(arr.length/2);i<arr.length;i+=2){
+  console.log(arr[i])
+}
+
+
+
+let arr = [1,2,3,4,5,6]
+
+let i =0;
+while(i<arr.length){
+  console.log(arr[i])
+  i+=2
+}
+
+console.log(arr[3])
+
+let arr = [1,2,3,4,5,6]
+
+// linear search BigO(n)
+
+let value = 6
+
+
+for(let i=0;i<arr.length;i++){
+  if(value===arr[i]){
+    console.log(`${value} found at ${i} position`);
+    break;
+  }
+}
+
+//binary search BigO(log(n))
+
+
+delete arr[5]
+arr.pop()
+arr.shift()
+arr.splice()
+console.log(arr)
\ No newline at end of file
diff --git a/javascript/Day52/callApplyBind.js b/javascript/Day52/callApplyBind.js
new file mode 100644
index 0000000..fe721be
--- /dev/null
+++ b/javascript/Day52/callApplyBind.js
@@ -0,0 +1,18 @@
+let person = {
+    name:'Ramesh',
+    getName:function(age,color){
+      console.log(this.name,age,color)
+    }
+  }
+  let person2 = {
+    name:'Gaurav',
+  }
+  
+person.getName.call(person2,23,'red')
+  
+  
+person.getName.apply(person2,[23,'red'])
+  
+const getNameNew = person.getName.bind(person2,32,'Red')
+
+getNameNew()
\ No newline at end of file