# math.inf constant with example in Python

Python math.inf constant: Here, we are going to learn about the math.inf constant of math module with example in Python.
Submitted by IncludeHelp, on April 19, 2019

## Python math.inf constant

math.inf constant is a predefined constant, which is defined in the math module, it returns a floating-point positive infinity (which is equivalent to float('inf')).

-math.inf can be used to find floating-point negative infinity (which is equivalent to float('-inf')).

Note: math.inf constant is available from Python 3.5

Syntax of math.inf constant:

```    math.inf
```

Return value: float – that is the value of positive infinity.

Example:

```    Input:
print(math.inf)

Output:
inf
```

### Python code to demonstrate example of math.inf constant

```# python code to demonstrate example of
# math.inf constant

# importing math module
import math

# printing value of infinity
print("value of positive infinity = ", math.inf)
print("value of negative infinity = ", -math.inf)
```

Output

```value of positive infinity = inf
value of negative infinity = -inf
```

Reference: Python math library

Preparation