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Ruby program to calculate the logarithm gamma of the given number

Last Updated : December 15, 2025

Problem Solution

In this program, we will read an integer number from the user using gets.chomp.to_i. Then we will calculate the logarithm gamma of a given number using the Math.lgamma() function.

Program/Source Code

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

# Ruby program to calculate the 
# logarithm gamma of the given number

print "Enter Number: ";
num = gets.chomp.to_i;  
 
result = Math.lgamma(num);

print "Result is: ",result;

Output

Enter Number: -25
Result is: [Infinity, 1]

Explanation

In the above program, we read an integer number from the user using gets.chomp.to_i and calculated the logarithm gamma of the input number using Math.lgamma() function printed the result.

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