diff --git a/Data Structure Using C/queue/circuler_queue.c b/Data Structure Using C/queue/circuler_queue.c
new file mode 100644
index 00000000..da2a7214
--- /dev/null
+++ b/Data Structure Using C/queue/circuler_queue.c	
@@ -0,0 +1,80 @@
+#include <stdio.h>
+#define MAX 5   // Size of circular queue
+
+int queue[MAX];
+int front = -1, rear = -1;
+
+// Function to insert (enqueue) element
+void enqueue(int value) {
+    if ((front == 0 && rear == MAX - 1) || (rear + 1) % MAX == front) {
+        printf("Queue Overflow! Cannot insert %d\n", value);
+    } else {
+        if (front == -1)  // First element
+            front = 0;
+        rear = (rear + 1) % MAX;
+        queue[rear] = value;
+        printf("%d inserted into queue.\n", value);
+    }
+}
+
+// Function to remove (dequeue) element
+void dequeue() {
+    if (front == -1) {
+        printf("Queue Underflow! Nothing to delete.\n");
+    } else {
+        printf("%d deleted from queue.\n", queue[front]);
+        if (front == rear) {  
+            // Queue became empty
+            front = rear = -1;
+        } else {
+            front = (front + 1) % MAX;
+        }
+    }
+}
+
+// Function to display queue elements
+void display() {
+    if (front == -1) {
+        printf("Queue is empty.\n");
+    } else {
+        printf("Queue elements: ");
+        int i = front;
+        while (1) {
+            printf("%d ", queue[i]);
+            if (i == rear) break;
+            i = (i + 1) % MAX;
+        }
+        printf("\n");
+    }
+}
+
+// Main function
+int main() {
+    int choice, value;
+
+    while (1) {
+        printf("\n--- Circular Queue Menu ---\n");
+        printf("1. Enqueue\n2. Dequeue\n3. Display\n4. Exit\n");
+        printf("Enter your choice: ");
+        scanf("%d", &choice);
+
+        switch (choice) {
+            case 1:
+                printf("Enter value to insert: ");
+                scanf("%d", &value);
+                enqueue(value);
+                break;
+            case 2:
+                dequeue();
+                break;
+            case 3:
+                display();
+                break;
+            case 4:
+                printf("Exiting program...\n");
+                return 0;
+            default:
+                printf("Invalid choice! Try again.\n");
+        }
+    }
+}
diff --git a/Data Structure Using C/queue/normal_queue.c b/Data Structure Using C/queue/normal_queue.c
new file mode 100644
index 00000000..3ec96d2d
--- /dev/null
+++ b/Data Structure Using C/queue/normal_queue.c	
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#define MAX 5   // Maximum size of queue
+
+int queue[MAX];
+int front = -1, rear = -1;
+
+// Function to insert (enqueue) element in queue
+void enqueue(int value) {
+    if (rear == MAX - 1) {
+        printf("Queue Overflow! Cannot insert %d\n", value);
+    } else {
+        if (front == -1)   // first element
+            front = 0;
+        rear++;
+        queue[rear] = value;
+        printf("%d inserted into queue.\n", value);
+    }
+}
+
+// Function to remove (dequeue) element from queue
+void dequeue() {
+    if (front == -1 || front > rear) {
+        printf("Queue Underflow! Nothing to delete.\n");
+    } else {
+        printf("%d deleted from queue.\n", queue[front]);
+        front++;
+    }
+}
+
+// Function to display the queue
+void display() {
+    if (front == -1 || front > rear) {
+        printf("Queue is empty.\n");
+    } else {
+        printf("Queue elements: ");
+        for (int i = front; i <= rear; i++) {
+            printf("%d ", queue[i]);
+        }
+        printf("\n");
+    }
+}
+
+// Main function
+int main() {
+    int choice, value;
+
+    while (1) {
+        printf("\n--- Queue Menu ---\n");
+        printf("1. Enqueue\n2. Dequeue\n3. Display\n4. Exit\n");
+        printf("Enter your choice: ");
+        scanf("%d", &choice);
+
+        switch (choice) {
+            case 1:
+                printf("Enter value to insert: ");
+                scanf("%d", &value);
+                enqueue(value);
+                break;
+            case 2:
+                dequeue();
+                break;
+            case 3:
+                display();
+                break;
+            case 4:
+                printf("Exiting program...\n");
+                return 0;
+            default:
+                printf("Invalid choice! Try again.\n");
+        }
+    }
+}
diff --git a/Data Structure Using C/search/binarysearch.c b/Data Structure Using C/search/binarysearch.c
new file mode 100644
index 00000000..9561ffc3
--- /dev/null
+++ b/Data Structure Using C/search/binarysearch.c	
@@ -0,0 +1,45 @@
+#include <stdio.h>
+
+int main() {
+    int arr[100], n, i, key;
+    int low, high, mid;
+
+    // Input array size
+    printf("Enter the number of elements: ");
+    scanf("%d", &n);
+
+    // Input sorted array
+    printf("Enter %d sorted elements:\n", n);
+    for (i = 0; i < n; i++) {
+        scanf("%d", &arr[i]);
+    }
+
+    // Input the element to search for
+    printf("Enter the element to search: ");
+    scanf("%d", &key);
+
+    // Binary Search starts
+    low = 0;
+    high = n - 1;
+    int found = 0;
+
+    while (low <= high) {
+        mid = (low + high) / 2;
+
+        if (arr[mid] == key) {
+            printf("Element found at index %d (position %d)\n", mid , mid+1);
+            found = 1;
+            break;
+        } else if (arr[mid] < key) {
+            low = mid + 1;
+        } else {
+            high = mid - 1;
+        }
+    }
+
+    if (!found) {
+        printf("Element not found in the array.\n");
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/Data Structure Using C/search/linearsearch.c b/Data Structure Using C/search/linearsearch.c
new file mode 100644
index 00000000..fc3e6eb3
--- /dev/null
+++ b/Data Structure Using C/search/linearsearch.c	
@@ -0,0 +1,36 @@
+#include <stdio.h>
+
+int linearSearch(int arr[], int size, int target) {
+    int i;
+    for (i = 0; i < size; i++) {
+        if (arr[i] == target) {
+            return i; //this is if the element is found
+        }
+    }
+    return -1; //this will give not found if element not found
+}
+
+int main() {
+    int arr[100], n, target, i;
+
+    printf("Enter the number of elements: ");
+    scanf("%d", &n);
+
+    printf("Enter %d elements:\n", n);
+    for (i = 0; i < n; i++) {
+        scanf("%d", &arr[i]);
+    }
+
+    printf("Enter the element to search for: ");
+    scanf("%d", &target);
+
+    int result = linearSearch(arr, n, target);
+
+    if (result != -1) {
+        printf("Element found at index %d (position %d)\n", result, result + 1);
+    } else {
+        printf("Element not found in the array.\n");
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/Data Structure Using C/sort/bubblrsort.c b/Data Structure Using C/sort/bubblrsort.c
new file mode 100644
index 00000000..3438c455
--- /dev/null
+++ b/Data Structure Using C/sort/bubblrsort.c	
@@ -0,0 +1,30 @@
+#include<stdio.h>
+
+void bubblesort(int arr[] , int n) {
+    for(int i=0 ; i<n-1 ; i++){
+        for(int j=0 ; j<n-i-1 ; j++){
+            if(arr[j] > arr[j+1]){
+                int temp = arr[j];
+                arr[j] = arr[j+1];
+                arr[j+1] = temp;
+            }
+        }
+    }
+}
+
+void display(int arr[] , int n){
+    for(int i=0 ; i<n ; i++){
+        printf("%d " , arr[i]);
+    }
+}
+
+int main(){
+    int n=5;
+    int arr[]={2,4,1,5,3};
+
+    bubblesort(arr , n);
+    display(arr , n);
+    return 0;
+
+
+}
\ No newline at end of file
diff --git a/Data Structure Using C/sort/insertionsort.c b/Data Structure Using C/sort/insertionsort.c
new file mode 100644
index 00000000..719ec226
--- /dev/null
+++ b/Data Structure Using C/sort/insertionsort.c	
@@ -0,0 +1,30 @@
+#include<stdio.h>
+
+void insertionsort(int arr[] , int n){
+    for(int i=1 ; i<n ; i++){
+        int curr=arr[i];
+        int pre=i-1;
+        while(pre>=0 && arr[pre]>curr){
+            arr[pre+1]=arr[pre];
+            pre--;
+        }
+        arr[pre+1]=curr;
+    }
+}
+
+void display(int arr[] , int n){
+    for(int i=0 ; i<n ; i++){
+        printf("%d " , arr[i]);
+    }
+}
+
+int main(){
+    int n=5;
+    int arr[]={2,4,1,5,3};
+
+    insertionsort(arr , n);
+    display(arr , n);
+    return 0;
+
+
+}
\ No newline at end of file
diff --git a/Data Structure Using C/sort/mergesort.c b/Data Structure Using C/sort/mergesort.c
new file mode 100644
index 00000000..625826e1
--- /dev/null
+++ b/Data Structure Using C/sort/mergesort.c	
@@ -0,0 +1,55 @@
+
+#include<stdio.h>
+
+void merge(int arr[] , int st , int mid , int end){
+    int temp[100];
+    int i=st , j=mid+1 , k=0;
+    while(i<=mid && j<= end){
+        if(arr[i] < arr[j]){
+            temp[k++]=arr[i++];
+        }
+        else{
+            temp[k++]=arr[j++];
+        }
+    }
+    while(i<=mid){
+        temp[k++]=arr[i++];
+    }
+    while(j<=end){
+        temp[k++]=arr[j++];
+    }
+    for(i=st , j=0 ; i<=end ; i++ , j++){
+        arr[i]=temp[j];
+    }
+
+}
+
+void mergesort(int arr[] , int st , int end){
+    if(st < end){
+        int mid = (st+end)/2;
+        mergesort(arr , st , mid); //left
+        mergesort(arr , mid+1 , end); //right
+
+        merge(arr , st , mid , end);
+    }
+
+}
+
+
+
+void display(int arr[] , int n){
+    for(int i=0 ; i<n ; i++){
+        printf("%d " , arr[i]);
+    }
+}
+
+int main(){
+    int st=0 , end=4 , n=5;
+    int arr[]={2,4,1,5,3};
+
+    mergesort(arr , st , end);
+    display(arr , n);
+    return 0;
+
+
+}
\ No newline at end of file
diff --git a/Data Structure Using C/sort/selectionsort.c b/Data Structure Using C/sort/selectionsort.c
new file mode 100644
index 00000000..948d9c7a
--- /dev/null
+++ b/Data Structure Using C/sort/selectionsort.c	
@@ -0,0 +1,32 @@
+#include<stdio.h>
+
+void selectionsort(int arr[] , int n){
+    for(int i=0 ; i<n-1 ; i++){
+        int sidx=i;
+        for(int j=i+1 ; j<n ; j++){
+            if(arr[j]<arr[sidx]){
+                sidx=j;
+            }
+        }
+        int temp=arr[i];
+        arr[i]=arr[sidx];
+        arr[sidx]=temp;
+    }
+}
+
+void display(int arr[] , int n){
+    for(int i=0 ; i<n ; i++){
+        printf("%d " , arr[i]);
+    }
+}
+
+int main(){
+    int n=5;
+    int arr[]={2,4,1,5,3};
+
+    selectionsort(arr , n);
+    display(arr , n);
+    return 0;
+
+
+}
\ No newline at end of file