C++ Math isinf()

The function determines whether the number is infinite or not. It can be positive or negative infinite. If the number is infinite, it returns 1 otherwise 0.

Syntax

Suppose a number is 'x'. Syntax would be:

Parameter

x: It is a floating point value.

Return value

Example 1

Let's see the simple example when the value of x is 1.0/0.0.

Output:

value of x is : inf
isinf(x) : 1   

In this example, isinf() function determines that the value of x is infinite. Therefore, it returns 1.

Example 2

Let's see the simple example when the value of x is 4.

Output:

value of x is : 4
isinf(x) : 0   

In this example, isinf() function determines that the value of x is finite. Therefore, it returns 0 value.