float() to convert string to floating point number in Python

float()

float() returns floating point number by taking string or integer as input .

Here are some examples with different type of input numbers

print(float())       # 0.0 
print(float(5))      # 5.0
print(float("34.5")) # 34.5

String inputs

print(float("  45.8 ")) # 45.8
print(float("InF"))     # inf
print(float("NaN"))     #nan
print(float("Infinity"))#inf

We will get error message based on input

print(float('abc45'))

Output

ValueError: could not convert string to float: 'abc45'

We can check type of data by using type(). Here we have used one float number.

print(type(4.5)) # <class 'float'>

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