diff --git a/C/diamond.c b/C/diamond.c
new file mode 100644
index 0000000..7987101
--- /dev/null
+++ b/C/diamond.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+int main()
+{
+  int n, c, k;
+
+  printf("Enter number of rows\n");
+  scanf("%d", &n);
+
+  for (k = 1; k <= n; k++)
+  {
+    for (c = 1; c <= n-k; c++)
+      printf(" ");
+
+    for (c = 1; c <= 2*k-1; c++)
+      printf("*");
+
+    printf("\n");
+  }
+
+  for (k = 1; k <= n - 1; k++)
+  {
+    for (c = 1; c <= k; c++)
+      printf(" ");
+
+    for (c = 1 ; c <= 2*(n-k)-1; c++)
+      printf("*");
+
+    printf("\n");
+  }
+
+  return 0;
+}
\ No newline at end of file
diff --git a/C/hollow_diamond.c b/C/hollow_diamond.c
new file mode 100644
index 0000000..f6b8a30
--- /dev/null
+++ b/C/hollow_diamond.c
@@ -0,0 +1,50 @@
+// C Program To Print Hollow Diamond
+#include <stdio.h>
+int main()
+{
+
+	int n = 5, rows, columns;
+	for (rows = 1; rows <= n; rows++) {
+
+		// used for printing the spaces
+		for (columns = n; columns > rows; columns--) {
+			printf(" ");
+		}
+
+		// print star
+		printf("*");
+
+		// again print the spaces
+		for (columns = 1; columns < (rows - 1) * 2;
+			columns++) {
+			printf(" ");
+		}
+		if (rows == 1) {
+			printf("\n");
+		}
+		else {
+			printf("*\n");
+		}
+	}
+	for (rows = n - 1; rows >= 1; rows--) {
+
+		// used for printing the spaces
+		for (columns = n; columns > rows; columns--) {
+			printf(" ");
+		}
+
+		// print star
+		printf("*");
+		for (columns = 1; columns < (rows - 1) * 2;
+			columns++) {
+			printf(" ");
+		}
+		if (rows == 1) {
+			printf("\n");
+		}
+		else {
+			printf("*\n");
+		}
+	}
+	return 0;
+}