diff --git a/C/program-83/program.c b/C/program-83/program.c
new file mode 100644
index 00000000..a8c5759b
--- /dev/null
+++ b/C/program-83/program.c
@@ -0,0 +1,29 @@
+/*program to calculate profit & loss in BITCOIN mining*/
+
+#include<stdio.h>
+
+int main(){
+ 
+   float current_btc_price, avg_cost;
+   float total_btc, profitloss;
+ 
+   printf("Enter Your Total Bitcoin: ");
+   scanf("%f",&total_btc);
+ 
+   printf("Enter Current Bitcoin Price: ");
+   scanf("%f",&current_btc_price);
+
+   printf("Your Average Bitcoin Purchase Price: ");
+   scanf("%f",&avg_cost);
+
+   //profitloss = (current_btc_price - averagecost) x total_btc 
+ 
+   profitloss = (current_btc_price - avg_cost) * total_btc;
+ 
+   if(profitloss > 0)
+ printf("Bitcoin Trading Profit is: %0.2f",profitloss);
+   else
+ printf("Bitcoin Trading Loss is: %0.2f",profitloss);
+ 
+   return 0;
+}
\ No newline at end of file