在 Python 中將字串轉換為浮點值

print(float("1"))
print(float("1.1"))
print(float("0.231"))
print(float("123"))
print(float("0"))
print(float("0.0"))
print(float("+12"))
print(float("10e10"))
print(float("-125"))

1.0
1.1
0.231
123.0
0.0
0.0
12.0
100000000000.0
-125.0

print(float("hello"))

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ValueError: could not convert string to float: 'hello'

strings = ["1.1", "-123.44", "+33.0000", "hello", "python", "112e34", "0"]

for s in strings:
    try:
        print(float(s))
    except ValueError:
        print("Conversion failed!")

1.1
-123.44
33.0
Conversion failed!
Conversion failed!
1.12e+36
0.0