added binary to hexadecimal conversion

conversions/binary2hexa.c

@@ -0,0 +1,21 @@
+/*
+ * C Program to Convert Binary to Hexadecimal 
+ */
+#include <stdio.h>
+ 
+int main()
+{
+    long int binary, hexa = 0, i = 1, remainder;
+ 
+    printf("Enter the binary number: ");
+    scanf("%ld", &binary);
+    while (binary != 0)
+    {
+        remainder = binary % 10;
+        hexa = hexa + remainder * i;
+        i = i * 2;
+        binary = binary / 10;
+    }
+    printf("THe Equivalent hexadecimal value: %lX", hexa);
+    return 0;
+}