How to express absolute value in c++

The absolute value in C is expressed as the abs function, which accepts one parameter and returns the same type of absolute value result. Syntax: #include ; double abs(double x); float abs(float x); long double abs(long double x).

Representation of absolute value in C

In C, the absolute value can be expressed by abs function to represent. This function receives a parameter representing the expression or variable whose absolute value is to be calculated, and returns an absolute value result of the same type.

Syntax:

<code class="cpp">#include <cmath>

double abs(double x);
float abs(float x);
long double abs(long double x);</code>

where x is the expression or variable whose absolute value is to be calculated.

Example:

<code class="cpp">#include <iostream>
#include <cmath>

using namespace std;

int main() {
  double x = -5.0;
  cout << "绝对值：" << abs(x) << endl;  // 输出：5

  float y = -1.234f;
  cout << "绝对值：" << abs(y) << endl;  // 输出：1.234

  long double z = -1234567890123.4567890123456789L;
  cout << "绝对值：" << abs(z) << endl;  // 输出：1234567890123.4567890123456789
}</code>

The above is the detailed content of How to express absolute value in c++. For more information, please follow other related articles on the PHP Chinese website!