C++ Math isinf() Function

C++ Math isinf() Function with tutorial for beginners and professionals with examples on isgreaterequal(), less(), islessequal(), islessgreater(), isunordered(), exp(), frexp(), ldexp(), log(), log10(), modf(), exp2(), expm1(), log1p(), log2(), logb(), scalbn(), scalbln() etc.

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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:

bool isinf(float x);
bool isinf(double x);
bool isinf(long double x);
bool isinf(integral x);

Parameter

x: It is a floating point value.

Return value

Parameter(x)	Return value
Finite value	Infinite value
0	1

Example 1

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

#include 
#include
using namespace std;
int main()
{
    float x=1.0/0.0;
    cout<<"value of x is : "<

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.

#include 
#include
using namespace std;
int main()
{
    int x=4;
    cout<<"value of x is : "<

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.

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