Home » Ruby Tutorial » Ruby Programs

Ruby program to calculate the cube root of the given number

Last Updated : December 15, 2025

Problem Solution

In this program, we will read a floating-point number from the user using gets.chomp.to_f. Then we will calculate the cube root of the number using the Math.cbrt() function.

Program/Source Code

The source code to calculate the cube root of the given number is given below. The given program is compiled and executed successfully.

# Ruby program to calculate the 
# cube root of the given number

print "Enter Number: ";
num = gets.chomp.to_f;  

CubeRoot = Math.cbrt(num);

print "Cube Root is: ",CubeRoot;

Output

Enter Number: 27
Cube Root is: 3.0

Explanation

In the above program, we read a floating-point number from the user using gets.chomp.to_f and calculated the cube root of the input number using Math.cbrt() function printed the result.

Ruby Basic Programs »