Add program in C to show variable (#20445)

guide/english/c/variables/index.md

@@ -103,3 +103,32 @@ We get `15.300000`. So, say we just want two places after the decimal to give us
 * Variables are created in the following format: `datatype variable_name = number`.
 * Format specifiers allow for variables to be printed.
 * The equals sign `=` allows for values to be assigned to variables.
+
+
+
+## Program to show variables
+
+```C
+#include<stdio.h>
+
+int main() {
+  int i;
+  float f;
+  printf ("enter integer value\n");
+  scanf ("%d", &i);
+  printf ("enter float value\n");
+  scanf ("%f", &f);
+  printf ("integer value: %d \nfloat value: %f\n", i, f);
+  return 0;
+}
+```
+
+#OUTPUT
+```sh
+enter integer value
+1
+enter float value
+2.2
+integer value: 1
+float value: 2.200000
+```