C++ Infinity: Using std::numeric_limits

1 year ago
Noah Thompson
1 minute

In C++, there is no built-in “inf” function. However, you can use “std::numeric_limits” from the standard math library to obtain the value for infinity. Here is an example code:

#include <iostream>
#include <limits>

int main() {
    double inf = std::numeric_limits<double>::infinity();

    std::cout << "无穷大值：" << inf << std::endl;

    return 0;
}

Output:

无穷大值：inf

In this example, we are using the std::numeric_limits::infinity() function to obtain the infinity value of the double data type. The value of infinity will be displayed as “inf”.

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