diff --git a/C/README.md b/C/README.md
index 2fb8a86b..8a0b269a 100644
--- a/C/README.md
+++ b/C/README.md
@@ -71,3 +71,4 @@
 | Program-67 | Program to calulate all the prime between the range of numbers includes the numbers which is provided. |
 | Program-68 | Program to accept 0s and 1s as input and print if it consists 3 consecutive 0s |
 | Program-69 | Program to find strong number |
+| Program-70 | Program to make a simple calculator |
diff --git a/C/program-70/README.md b/C/program-70/README.md
new file mode 100644
index 00000000..0b00a221
--- /dev/null
+++ b/C/program-70/README.md
@@ -0,0 +1,3 @@
+Program 70
+
+C program to make simple calculator
\ No newline at end of file
diff --git a/C/program-70/program70.c b/C/program-70/program70.c
new file mode 100644
index 00000000..8b90c5bf
--- /dev/null
+++ b/C/program-70/program70.c
@@ -0,0 +1,38 @@
+#include<stdio.h>
+  int main()
+  {  
+   char op;
+   float number1,number2,result;
+   for(int i=0; i<5;i++)
+    {
+    printf("\nEnter\n + for Addition \n - for Subtraction \n * for Multiplication \n / for Division"); 
+    printf("\nEnter the operation you want to perform\n");
+    scanf("%s",&op);
+    printf("Enter two numbers\n");
+    scanf("%f %f",&number1,&number2); 
+    switch(op)
+    {
+        case'+':result=number1+number2;
+                printf("Sum is %f\n",result);
+                break;
+        case'-':result=number1-number2;
+                printf("Difference is %f\n",result);
+                break;
+        case'*':result=number1*number2;
+                printf("Product is %f\n",result);
+                break;
+        case'/':if(number2==0)
+                {
+                printf("Division not possible\n");
+                }
+                else
+                {
+                result=number1/number2;
+                printf("Quotient is %f\n",result);
+                }
+                break;
+        default:printf("Enter proper input\n");
+    }
+    }
+    return 0;
+ }
\ No newline at end of file