How to type the root number in C language

In C language, use the sqrt() function to find the root. This function receives a floating point number and returns its square root. Correct usage: #include <math.h>, sqrt(double x);

## Find the root number in C language

sqrt().

Usage:

sqrt() The function receives a floating-point number as a parameter and returns the square root of the number. Its syntax is as follows:

<code class="c">double sqrt(double x);</code>

Example:

sqrt() function in C language:

<code class="c">#include <math.h>

int main() {
  double x = 4.0;
  double y = sqrt(x);
  printf("x 的平方根为：%f\n", y);
  return 0;
}</code>

<code>x 的平方根为：2.000000</code>

Note:

##sqrt()
• The function can only handle positive floating point numbers. If the argument is negative, NaN (not a number) is returned.
sqrt()
• The function returns a floating point type value, even if the argument is an integer. Before using the
sqrt()
• function, you need to include the <math.h> header file.

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