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C++ Math isfinite()

The function determines the value whether it is finite or not. It should not be NaN or infinite value. If the number is finite, it returns 1 otherwise 0.

Note: A finite value is a value that is neither NAN nor infinite.

Syntax

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

Parameter

x: It is a floating point value.

Return value

Parameter(x) Return value
Finite value 1
NAN or infinite value 0

Example 1

Let's see the simple example when the value of x is 10.

Output:

value of x is : 10
isfinite(x) : 1   

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

Example 2

Let's see another simple example.

Output:

value of x is : -nan
isfinite(x) : 0   

In this example, isfinite() function determines that x is a Not a Number. Therefore, it returns 0.

Example 3

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

Output:

value of x is : inf
isfinite(x) : 0   

In this example, isfinite(x) determines that x is a infinite number.Therefore, it returns 0 value.


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