Lesson3:while Statement Simple Application

Sample 1: Use the while statement for continuous computation:

A =float (raw_input ("Please input a number:"))
While a!=0:
B=raw_input ("Please input a operator:")
C=float (raw_input ("Please input another number:"))
If b== "-":
Print "Result:", a-c
A=a-c
Elif b== "+":
Print "Result:", a+c
A=a+c
Else
Print "Input error. Please input as: +-"
Break

Issue 1: The calculation results are not printed in the original error program, so even if a value is computed and assigned, it will look like a dead loop

Issue2: When writing a while condition, this calculation is calculated over a long period of time, and ends only when an invalid operator is entered, so the while condition writes the value of the long loop as true

ISSUE3: Terminates the operation by entering an illegal operator break.

Lesson3:while Statement Simple Application