compound_interest updates

compound_interest.py

@@ -2,6 +2,7 @@
 # Do not use this in production. Sample purpose only.
 
 # Author: Upkar Lidder (IBM)
+# Updated by HamzaIDM
 
 # Input:
 # p, principal amount
@@ -10,15 +11,26 @@
 
 # Output:
 # compound interest = p * (1 + r/100)^t
-
+import sys
 
 def compound_interest(p, t, r):
     return p * (pow((1 + r / 100), t))
 
+def main():
 
-if __name__ == "__main__":
-    p = float(input("Enter the principal amount: "))
-    t = float(input("Enter the time period: "))
-    r = float(input("Enter the rate of interest: "))
+    # for speed
+    read = sys.stdin.readline
+    write = sys.stdout.write
+
+    write("Enter the principal amount: ")
+    p = float(read())
+    write("Enter the time period: ")
+    t = float(read())
+    write("Enter the interest rate: ")
+    r = float(read())
 
-    print("The compound interest is {:.2f}".format(compound_interest(p, t, r)))
+    print(f"The compound interest is {compound_interest(p, t, r):.2f}")
+
+
+if __name__ == "__main__":
+    main()