'This code keeps looping when the variable "op" is not in the "valid" list [closed]
valid = (None, "add", "sub", "mul", "div")
num = 0
operation = "add"
print("Operations: add(addition), sub(subtraction), mul(multiplication), div(division), adv(advanced)")
op = None
while True:
print(num)
op = str(input("Math operation: "))
while True:
print(num)
if op not in valid:
print("invalid operation!")
op = None
continue
if op == "add":
operation = "add"
num_ = float(input("Add: "))
if num_ != 0:
num += num_
continue
else:
break
continue
elif op == "sub":
operation = "sub"
num_ = float(input("Subtract: "))
if num_ != 0:
num -= num_
continue
else:
break
continue
elif op == "mul":
operation = "mul"
num_ = float(input("Multiply: "))
if num_ != 0:
num *= num_
continue
else:
break
continue
elif op == "div":
operation = "div"
num_ = float(input("Divide: "))
if num_ != 0:
num /= num_
continue
else:
break
Solution 1:[1]
The correct indentation(I think)
valid = (None, "add", "sub", "mul", "div")
num = 0
operation = "add"
print("Operations: add(addition), sub(subtraction), mul(multiplication), div(division), adv(advanced)")
op = None
while True:
print(num)
op = str(input("Math operation: "))
while True:
print(num)
if op not in valid:
print("invalid operation!")
op = None
continue
if op == "add":
operation = "add"
num_ = float(input("Add: "))
if num_ != 0:
num += num_
continue
else:
break
continue
elif op == "sub":
operation = "sub"
num_ = float(input("Subtract: "))
if num_ != 0:
num -= num_
continue
else:
break
continue
elif op == "mul":
operation = "mul"
num_ = float(input("Multiply: "))
if num_ != 0:
num *= num_
continue
else:
break
continue
elif op == "div":
operation = "div"
num_ = float(input("Divide: "))
if num_ != 0:
num /= num_
continue
else:
break
This seems to also reproduce the error when you input an operation not listed valid.
The fix for this would be to break from the code and instead of putting in continue you would change it with break.
The fix:
valid = (None, "add", "sub", "mul", "div")
num = 0
operation = "add"
print("Operations: add(addition), sub(subtraction), mul(multiplication), div(division), adv(advanced)")
op = None
while True:
print(num)
op = str(input("Math operation: "))
while True:
print(num)
if op not in valid:
print("invalid operation!")
op = None
#the break
break
if op == "add":
operation = "add"
num_ = float(input("Add: "))
if num_ != 0:
num += num_
continue
else:
break
continue
elif op == "sub":
operation = "sub"
num_ = float(input("Subtract: "))
if num_ != 0:
num -= num_
continue
else:
break
continue
elif op == "mul":
operation = "mul"
num_ = float(input("Multiply: "))
if num_ != 0:
num *= num_
continue
else:
break
continue
elif op == "div":
operation = "div"
num_ = float(input("Divide: "))
if num_ != 0:
num /= num_
continue
else:
break
The output:
Operations: add(addition), sub(subtraction), mul(multiplication), div(division), adv(advanced)
0
Math operation: no
0
invalid operation!
0
Math operation: no
0
invalid operation!
0
Math operation:
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Blue Robin |