diff --git a/HighestFreq.c.txt b/HighestFreq.c.txt
new file mode 100644
index 0000000..e9ff4e5
--- /dev/null
+++ b/HighestFreq.c.txt
@@ -0,0 +1,61 @@
+/* 
+ * C Program To Find the Highest Frequency Character in a String
+ */
+#include <stdio.h>
+#include <string.h>
+ 
+char string1[100], visited[100];
+int count[100] = {0}, flag = 0;
+ 
+void main()
+{
+    int i, j = 0, k = 0, l, max, index;
+ 
+    printf("Enter a string : ");
+    scanf("%[^\n]s", string1);
+ 
+    l = strlen(string1);
+ 
+    for (i = 0; i < l; i++)
+    {
+        if (i == 0)
+        {
+            visited[j++] = string1[i];
+            count[j - 1]++;
+        }
+        else
+        {
+            for (k = 0; k  < j; k++)
+            {
+                if (string1[i] == visited[k])
+                {
+                    count[k]++;
+                    flag = 1;
+                }
+            }
+            if (flag == 0)
+            {
+                visited[j++] = string1[i];
+                count[j - 1]++;
+            }
+            flag = 0;
+        }
+    }    
+ 
+    for (i = 0; i < j; i++)
+    {
+        if ((i == 0) && (visited[i] != ' '))
+        {
+            max = count[i];
+            continue;
+        }
+        if ((max < count[i]) && (visited[i] != ' '))
+        {
+            max = count[i];
+            index = i;
+        }
+    }
+ 
+    printf("\nMax repeated character in the string = %c ", visited[index]);
+    printf("\nIt occurs %d times", count[index]);
+}
diff --git a/MatrixOperations.c b/MatrixOperations.c
new file mode 100644
index 0000000..6ad2d78
--- /dev/null
+++ b/MatrixOperations.c
@@ -0,0 +1,110 @@
+#include <stdio.h>
+
+void createDiagonalMatrix(int n) {
+    int matrix[n][n];
+    
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            matrix[i][j] = (i == j) ? 1 : 0;
+        }
+    }
+
+    printf("Diagonal Matrix:\n");
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            printf("%d ", matrix[i][j]);
+        }
+        printf("\n");
+    }
+}
+
+void createSquareMatrix(int size) {
+    int matrix[size][size];
+
+    for (int i = 0; i < size; i++) {
+        for (int j = 0; j < size; j++) {
+            printf("Enter element at position (%d, %d): ", i, j);
+            scanf("%d", &matrix[i][j]);
+        }
+    }
+
+    printf("Square Matrix:\n");
+    for (int i = 0; i < size; i++) {
+        for (int j = 0; j < size; j++) {
+            printf("%d ", matrix[i][j]);
+        }
+        printf("\n");
+    }
+}
+
+int sumMatrixElements(int rows, int cols) {
+    int matrix[rows][cols];
+    int totalSum = 0;
+
+    for (int i = 0; i < rows; i++) {
+        for (int j = 0; j < cols; j++) {
+            printf("Enter element at position (%d, %d): ", i, j);
+            scanf("%d", &matrix[i][j]);
+            totalSum += matrix[i][j];
+        }
+    }
+
+    printf("Custom Matrix:\n");
+    for (int i = 0; i < rows; i++) {
+        for (int j = 0; j < cols; j++) {
+            printf("%d ", matrix[i][j]);
+        }
+        printf("\n");
+    }
+
+    return totalSum;
+}
+
+int main() {
+    while (1) {
+        printf("Menu:\n");
+        printf("1: Enter numbers diagonally\n");
+        printf("2: Create a particular sized square matrix\n");
+        printf("3: Calculate sum of elements in matrix\n");
+        printf("4: Exit\n");
+        
+        int choice;
+        printf("Enter your choice: ");
+        scanf("%d", &choice);
+
+        switch (choice) {
+            case 1: {
+                int size;
+                printf("Enter matrix size: ");
+                scanf("%d", &size);
+                createDiagonalMatrix(size);
+                break;
+            }
+            case 2: {
+                int size;
+                printf("Enter matrix size: ");
+                scanf("%d", &size);
+                createSquareMatrix(size);
+                break;
+            }
+            case 3: {
+                int rows, cols;
+                printf("Enter number of rows: ");
+                scanf("%d", &rows);
+                printf("Enter number of columns: ");
+                scanf("%d", &cols);
+                int totalSum = sumMatrixElements(rows, cols);
+                printf("Sum of elements in the matrix: %d\n", totalSum);
+                break;
+            }
+            case 4: {
+                printf("Exiting...\n");
+                return 0;
+            }
+            default:
+                printf("Invalid choice! Please select a valid option.\n");
+        }
+    }
+
+    return 0;
+}
diff --git a/string operation 1.c.txt b/string operation 1.c.txt
new file mode 100644
index 0000000..bbb0c8d
--- /dev/null
+++ b/string operation 1.c.txt	
@@ -0,0 +1,30 @@
+#include<stdio.h>
+ 
+// Funtion removing spaces from string
+char * removeSpacesFromStr(char *string)
+{
+    // non_space_count to keep the frequency of non space characters
+    int non_space_count = 0;
+ 
+    //Traverse a string and if it is non space character then, place it at index non_space_count
+    for (int i = 0; string[i] != '\0'; i++)
+    {
+        if (string[i] != ' ')
+        {
+            string[non_space_count] = string[i];
+            non_space_count++;//non_space_count incremented
+        }    
+    }
+    
+    //Finally placing final character at the string end
+    string[non_space_count] = '\0';
+    return string;
+}
+ 
+int main()
+{
+    char string[] = "Edpresso: Dev    -Shot";
+    printf("%s \n",string);
+    printf("%s",removeSpacesFromStr(string));
+    return 0;
+}
\ No newline at end of file