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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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