diff --git a/program-10/program.c b/program-10/program.c
new file mode 100644
index 00000000..48bd13ea
--- /dev/null
+++ b/program-10/program.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main()
+{
+  int a,b,c;
+    printf("enter the a");
+    scanf("%d",&a);
+   b=a<<1;
+   c=a>>1;
+   printf("%d\n%d",b,c);
+    return 0;
+}
diff --git a/program-11/program.c b/program-11/program.c
new file mode 100644
index 00000000..e66a5918
--- /dev/null
+++ b/program-11/program.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{ int a,b;
+printf("enter 2 no\n");
+scanf("%d%d",&a,&b);
+    printf("*** A.O ***\n");
+    printf("%d + %d = %d\n",a,b,a+b);
+    printf("%d - %d = %d\n",a,b,a-b);
+     printf("%d * %d = %d\n",a,b,a*b);
+      printf("%d / %d = %.2f\n",a,b,(float)a/b);
+       printf("%d %%  %d = %d\n",a,b,a%b);
+    return 0;
+}
diff --git a/program-12/program.c b/program-12/program.c
new file mode 100644
index 00000000..869dad3b
--- /dev/null
+++ b/program-12/program.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{ int a,b;
+printf("enter 2 no\n");
+scanf("%d%d",&a,&b);
+    printf("*** relational operator ***\n");
+    printf("%d > %d = %d\n",a,b,a>b);
+    printf("%d < %d = %d\n",a,b,a<b);
+     printf("%d >= %d = %d\n",a,b,a>=b);
+      printf("%d <= %d = %d\n",a,b,a<=b);
+      printf("%d  != %d = %d\n",a,b,a!=b);
+       printf("%d  == %d = %d\n",a,b,a==b);
+    return 0;
+}
diff --git a/program-13/program.c b/program-13/program.c
new file mode 100644
index 00000000..02cb73f2
--- /dev/null
+++ b/program-13/program.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main()
+{ int a,b;
+printf("enter 2 no\n");
+scanf("%d%d",&a,&b);
+    printf("*** bitwise operator ***\n");
+    printf("%d >> %d = %d\n",a,b,a>>b);
+    printf("%d << %d = %d\n",a,b,a<<b);
+     printf("%d ^ %d = %d\n",a,b,a^b);
+      printf("%d & %d = %d\n",a,b,a&b);
+      printf("%d  | %d = %d\n",a,b,a|b);
+       printf(" ~ %d = %d\n",a,~a);
+    return 0;
+}
diff --git a/program-14/program.c.c b/program-14/program.c.c
new file mode 100644
index 00000000..2f6fdc04
--- /dev/null
+++ b/program-14/program.c.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main()
+{ int a,b,c,d;
+printf("enter 1 no\n");
+scanf("%d",&a);
+b=c=d=a;
+    printf("*** increment and decrement operator ***\n");
+    printf("%d \n",++a);
+    printf("%d \n",--b);
+
+     printf("%d\n",c++);
+     printf("%d\n",d--);
+
+    return 0;
+}
diff --git a/program-3/program.c b/program-3/program.c
new file mode 100644
index 00000000..c1928f53
--- /dev/null
+++ b/program-3/program.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+int main()
+{
+    int a,b,c;
+    printf("enter a,b,c");
+    scanf("%d%d%d",&a,&b,&c);
+    if(a>b && a>c) printf("a is larger");
+    if(b>a && b>c) printf("b is larger");
+    if(c>a && c >b ) printf("c is larger");
+}
diff --git a/program-4/program.c b/program-4/program.c
new file mode 100644
index 00000000..e2747aa4
--- /dev/null
+++ b/program-4/program.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+int main()
+{
+    int a,b,c;
+    printf("enter a,b,c");
+    scanf("%d%d%d",&a,&b,&c);
+    if(a>b && a>c) printf("a is larger");
+    else if(b>a && b>c) printf("b is larger");
+    else  printf("c is larger");
+}
diff --git a/program-5/program.c b/program-5/program.c
new file mode 100644
index 00000000..055c22b9
--- /dev/null
+++ b/program-5/program.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+int main()
+{
+    int a,b,c;
+    printf("enter a,b,c");
+    scanf("%d%d%d",&a,&b,&c);
+   if(a>b)
+   {
+       if(a>c) printf("a is larger");
+       else printf("c is larger");
+   }
+   else
+   {
+       if(b>c) printf("b is larger");
+       else printf("c is larger");
+   }
+}
diff --git a/program-6/program.c b/program-6/program.c
new file mode 100644
index 00000000..b07b7e6b
--- /dev/null
+++ b/program-6/program.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+int main()
+{
+    int a,b,c;
+    printf("enter a,b,c");
+    scanf("%d%d%d",&a,&b,&c);
+(a>b)?(a>c)?printf("a is larger"):printf("c is larger"):(b>c)?printf("b is larger"):printf("c is larger");
+}
diff --git a/program-7/program.c b/program-7/program.c
new file mode 100644
index 00000000..5a827950
--- /dev/null
+++ b/program-7/program.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+int main()
+{
+    int y;
+    printf("enter year");
+    scanf("%d",&y);
+if(y%400 ==0 || (y%4==0 && y%100!=0)) printf("leap year");
+else printf("not a leap year");
+}
+
diff --git a/program-8/program.c b/program-8/program.c
new file mode 100644
index 00000000..1f6d6397
--- /dev/null
+++ b/program-8/program.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+int main()
+{
+
+    int y,n,m,d,j;
+    printf("enter the input");
+    scanf("%d",&n);
+    y=n/365;
+    m=n%365;
+    j=m/30;
+    d=j%30;
+    printf("year=%d",y);
+    printf("months =%d",j);
+    printf("days=%d",d);
+}
diff --git a/program-9/program.c b/program-9/program.c
new file mode 100644
index 00000000..9626d884
--- /dev/null
+++ b/program-9/program.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main()
+{
+  int a,b;
+    printf("enter the a,b");
+    scanf("%d%d",&a,&b);
+    if((a^b)) printf("not similar");
+    else printf("similar");
+    return 0;
+}