Update readme

README.md

@@ -1,8 +1,15 @@
-# C PROGRAMS
+<h1 align="center">C Programs</h1>
+
+<div align= "center"><img src="https://github.com/Ayushparikh-code/C-Programs-/blob/update-readme/513de10da425f3790aa54c94f23c06b8.jpg?raw=true" width="400" height="200"/>
+
+<h4>C is a general-purpose, procedural computer programming language supporting structured programming, lexical variable scope, and recursion, with a static type system. By design, C provides constructs that map efficiently to typical machine instructions.
 
-C is a general-purpose, procedural computer programming language supporting structured programming, lexical variable scope, and recursion, with a static type system. By design, C provides constructs that map efficiently to typical machine instructions
 
  It can be used to develop software like operating systems, databases, compilers, and so on.
 
 
- Hre you could contribute to your first C programs and can get your PR Merged with us
+ Here you could contribute to your C programs and get your PR Merged with us !
+</h4>
+</div>
+
+

calc_nPr.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+void main()
+{
+    int n, r, npr_var;
+
+    printf("Enter the value of n:");
+    scanf("%d", &n);
+    printf("\nEnter the value of r:");
+    scanf("%d", &r);
+
+    /* nPr is also known as P(n,r), the formula is:
+     * P(n,r) = n! / (n - r)! For 0 <= r <= n.
+     */
+    npr_var = fact(n) / fact(n - r);
+    printf("\nThe value of P(%d,%d) is: %d",n,r,npr_var);
+}
+// Function for calculating factorial
+int fact(int num)
+{
+    int k = 1, i;
+    // factorial of 0 is 1
+    if (num == 0)
+    {
+        return(k);
+    }
+    else
+    {
+        for (i = 1; i <= num; i++)
+    {
+            k = k * i;
+	}
+    }
+    return(k);
+}
+Output:
+
+Enter the value of n:
+5 
+Enter the value of r:
+2
+The value of P(6,2) is: 30