tei2020-20200605

seminar-personal/tei2020
N班ゼミ

課題1-Sum from 1 to 100 †

• first algorithm # sum and range function

  print(sum(range(1,101))) 
  

• second algorithm # for loop

  sum = 0
  for x in  range(101):
      sum = sum + x
  print(sum)
  

• third algorithm # while loop

  i = 1
  sum = 0
  while i <= 100:
      sum += i
      i += 1
  print(sum)
  

課題2-Sum from a to b #　enter a & b from the keyboard †

a = int(input("Enter first number: "))
b = int(input("Enter last number: "))

print("Sum from",a,"to",b,"is",sum(range(a,b+1)))

課題3-Build a calculator †

str_input=input("式は？")
i = str_input.split()
if len(i)==3:
   num1=float(i[0])
   op =i[1]
   num2=float(i[2])
   if op=="+":
       print(num1+num2)
   elif op=="-":
       print(num1-num2)
   elif op=="*":
       print(num1*num2)
   elif op=="/":
       print(num1/num2)
   else:
       print("Invalid operator")
else:
   print("Input error")