Cbrt() Function in C - Coding

cbrt() function in C is a predefined function in the math.h library used to calculate the cube root of a given number. To use this function, we must include the <math.h> header file in our program. It returns the cube root of the number as a double and works with double data types. For other data types like float or long double, we can use cbrtf() and cbrtl() functions, respectively.

Syntax of cbrt() in C

double cbrt(double x);

Parameters of cbrt()

The cbrt(x) function takes a single parameter x:

x: is a variable of type double whose cube root is to be computed. The value of x can range from negative infinity to positive infinity.

Return Value of cbrt()

The cbrt(x) function returns the cube root of the given number x which is passed in the form of radian. The cbrt function supports both negative and positive values so there is no chance for domain errors.

Examples of cbrt() Function in C

Input:
double x= 27.0

Output:
The cube root of 27.0 is 3.000000

Example 1

The below program illustrates how to calculate the cube root of a given number using the cbrt(x) function in C.

C++

// C Program to calculate the cube root of a number using
// cbrt() function

#include <math.h>
#include <stdio.h>

int main()
{
    // Initialize variable to take the input from the user
    // and store the results
    double x, cubeRoot;

    // Take the input from the user
    printf("Enter a number: ");

    // Read the number entered by the user
    scanf("%lf", &x);

    // Calculate the cube root of the entered number
    cubeRoot = cbrt(x);

    // Print the cube root of the x
    printf("The cube root of %.2lf is: %.2lf\n", x,
           cubeRoot);

    return 0;
}

Output

Enter a number: 27
The cube root of 27.00 is: 3.00

Time Complexity: O(1)
Auxiliary Space: O(1)

Example 2

The below program illustrates how to find the cube root of different data types in C.

C++

// C program to calculate the cube root of different data
// types in C

#include <math.h>
#include <stdio.h>

int main()
{
    // Initialize variables of different data types
    double num1 = 27.0;
    // float type variable
    float num2 = 64.0f;
    // long double type variable
    long double num3 = 125.0l;

    // Calculate the cube root using the appropriate cbrt
    // function for each data type

    // cbrt function for double
    double result1 = cbrt(num1);

    // cbrtf function for float
    float result2 = cbrtf(num2);

    // cbrtl function for long double
    long double result3 = cbrtl(num3);

    // Print the results
    printf("The Cube root of %.2f is %.2f\n", num1,
           result1);
    printf("The Cube root of %.2f is %.2f\n", num2,
           result2);
    printf("The Cube root of %.2Lf is %.2Lf\n", num3,
           result3);

    return 0;
}

Output

The Cube root of 27.00 is 3.00
The Cube root of 64.00 is 4.00
The Cube root of 125.00 is 5.00

Time Complexity: O(1)
Auxiliary Space: O(1)

Reffered: https://www.geeksforgeeks.org

C Language

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