diff --git a/C/README.md b/C/README.md
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+++ b/C/README.md
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+[//]:: (Start of README with a markdown comment.)
+# Here Are The C Codes
+
+----
+
+- Use this **[link](https://www.programiz.com/c-programming/online-compiler/)** to run *c codes*.
+- code ***main-recursion.c*** is a program which use main() function.
+- `main()` function used for recursive calls. 
+- print `hello` till user enter commands to execute.
+- it will exit the code when `entered 0` for exit.
+- don't use values other than `integers`.
+
+----
+
+[//]:: (End of README with a markdown comment.)
diff --git a/C/recursion-with-main.c b/C/recursion-with-main.c
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+++ b/C/recursion-with-main.c
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+#include<stdio.h>
+int main()
+{
+    int a;
+    printf("Enter command ::: ");
+    scanf("%d",&a);
+    if (a) {
+        printf("hello\n");
+        // Here's comes the recursive calls.
+        main();
+    }
+    // Here's comes the recursive exit.
+    // Recursion without exit isn't good practice.
+    // No one wants infinite calls.
+    else printf("Exit");
+    return 0;
+}