Home » Ruby » Ruby Programs

Ruby program to calculate the power of a given number using recursion

Ruby Example: Write a program to calculate the power of a given number using recursion.
Submitted by Nidhi, on December 24, 2021

Problem Solution:

In this program, we will read a number and power from the user and calculate the power of the number using recursive function and return the result.

Program/Source Code:

The source code to calculate the power of a given number using recursion is given below. The given program is compiled and executed successfully.

# Ruby program to calculate the 
# power of given number using recursion

def CalculatePower(num, power)
	result = 1;
	if power > 0 
		result = num * (CalculatePower(num, power-1));
	end
	return result;
end

print "Enter number: ";
number = gets.chomp.to_i;  

print "Enter power: ";
power = gets.chomp.to_i;  

result = CalculatePower(number, power);
print "result: ",result;

Output:

Enter number: 2
Enter power: 3
result: 8

Explanation:

In the above program, we read a number and power from the user and called the created recursive function CalculatePower() function and got the result. Then we printed the result.