Ruby program to get the predecessor of an integer number using library function

Program/Source Code:

The source code to get the predecessor of an integer number using the library function is given below. The given program is compiled and executed successfully.

# Ruby program to get the predecessor of an 
# integer number using library function

num1 = 20;
num2 = -23

print "Predecessor of num1: ",num1.pred(),"\n";
print "Predecessor of num2: ",num2.pred(),"\n";

Output:

Predecessor of num1: 19
Predecessor of num2: -24

Explanation:

In the above program, we created two variables num1, num2 and initialized 20, -23 respectively. Then we got the predecessor of the given integer number using the pred() library function and printed the result.