How do you print a float output in python?

Question

If you define a value without decimals, Python will interpret it as an integer, and if you specify values that include decimals will be interpreted as floating-point numbers.

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Print list of float values in Python
float() Syntax
float() Parameters
float() Return Value
Example 1: How float() works in Python?
Example 2: float() for infinity and Nan(Not a number)?
How do you print a float value in Python?
How do you print a float?
How do you print a float and integer in Python?

To print float values in Python, use the print() function. The print() is a built-in function that prints the defined message to the screen or standard output device like a Python console.

To print float values with two decimal places in Python, use the str.format() with “{:.2f}” as str. The str.format() function formats the specified value and insert them inside the string’s placeholder. Then use the print() function with the formatted float-string as a string to print the float values.

Syntax

print("{:.2f}".format(float_values))

Example

float_val = 19.211146

formatted_float_value = "{:.2f}".format(float_val)
print(formatted_float_value)

Output

We can see that we defined a float_val, a string representing the number with six decimal places.

Using print() function and str.format() with “{:.2f}”, we printed the float values up to two decimal values.

If we want a float value with four decimal places, then you should use “{:.4f}”. The format() method returns the formatted string.

float_val = 19.211146

formatted_float_value = "{:.4f}".format(float_val)
print(formatted_float_value)

Output

We can see that we printed a float value with four decimal places.

Print list of float values in Python

To print a list of float values, use the list comprehension with “%.2f”.

data_list = [1.1111, 2.1134, 2.444444, 9.00022]

float_values = ["%.2f" % x for x in data_list]
print(float_values)

Output

['1.11', '2.11', '2.44', '9.00']

All the values are converted into two decimal place values.

That’s it for this tutorial.

Krunal Lathiya is an Information Technology Engineer. By profession, he is a web developer with knowledge of multiple back-end platforms including Python. Krunal has written many programming blogs which showcases his vast knowledge in this field.

If you just want to convert the values to nice looking strings do the following:

twodecimals = ["%.2f" % v for v in vars]

Alternatively, you could also print out the units like you have in your question:

vars = [0, 1, 2, 3] # just some example values
units = ['kg', 'lb', 'gal', 'l']
delimiter = ', ' # or however you want the values separated

print delimiter.join(["%.2f %s" % (v,u) for v,u in zip(vars, units)])
Out[189]: '0.00 kg, 1.00 lb, 2.00 gal, 3.00 l'

The second way allows you to easily change the delimiter (tab, spaces, newlines, whatever) to suit your needs easily; the delimiter could also be a function argument instead of being hard-coded.

Edit: To use your 'name = value' syntax simply change the element-wise operation within the list comprehension:

print delimiter.join(["%s = %.2f" % (u,v) for v,u in zip(vars, units)])
Out[190]: 'kg = 0.00, lb = 1.00, gal = 2.00, l = 3.00'

The float() method returns a floating point number from a number or a string.

Example

int_number = 25

# convert int to float
float_number = float(int_number)
print(float_number)

# Output: 25.0

float() Syntax

The syntax for float() is:

float([x])

float() Parameters

The float() method takes a single parameter:

x (Optional) - number or string that needs to be converted to floating point number
If it's a string, the string should contain decimal points

Parameter Type	Usage
Float number	Use as a floating number
Integer	Use as an integer
String	Must contain decimal numbers. Leading and trailing whitespaces are removed. Optional use of "+", "-" signs. Could contain `NaN`, `Infinity`, `inf` (lowercase or uppercase).

float() Return Value

The float() method returns:

Equivalent floating point number if an argument is passed
0.0 if no arguments passed
OverflowError exception if the argument is outside the range of Python float

Example 1: How float() works in Python?

# for integers
print(float(10))

# for floats
print(float(11.22))

# for string floats
print(float("-13.33"))

# for string floats with whitespaces
print(float("     -24.45\n"))

# string float error
print(float("abc"))

Output

10.0
11.22
-13.33
-24.45
ValueError: could not convert string to float: 'abc'

Example 2: float() for infinity and Nan(Not a number)?

# for NaN
print(float("nan"))
print(float("NaN"))

# for inf/infinity
print(float("inf"))
print(float("InF"))
print(float("InFiNiTy"))
print(float("infinity"))

Output

nan
nan
inf
inf
inf
inf

How do you print a float value in Python?

Use str. Call str. format(number) with "{:. 2f}" as str and a float as number to return a string representation of the number with two decimal places. Call print(string) with the formatted float-string as string to print the float.

How do you print a float?

k = x + 1 + y ( + 1 for the dot) and float_variable_name is the float variable that you want to get printed. Suppose you want to print x digits before the decimal point and y digits after it.