update

challenges27-34/challenge-028.py

@@ -1,3 +1,3 @@
 number = float(input('Enter number with lots of decimal number : '))
-print(round(number*2, 2))
-
+#print(round(number*2, 2))
+print(round(number*2))

challenges27-34/challenge-029.py

@@ -1,4 +1,5 @@
 import math
 
 number = int(input('Enter number over 500 : '))
-print(round(math.sqrt(number)))
+#print(round(math.sqrt(number)))
+print(round(math.sqrt(number), 2))

challenges27-34/challenge-030.py

@@ -1,3 +1,3 @@
 import math
-
-print(round(math.pi, 5))
+dig = int(input("how many digits you want: "))
+print(round(math.pi, dig))

challenges27-34/challenge-031.py

@@ -1,5 +1,6 @@
 import math
 
 radius = float(input('Enter circle radius : '))
+# ** 表示幂计算
 area = math.pi * (radius**2)
 print(area)