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

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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

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

num1 = 20;
num2 = -23

print "Successor of num1: ",...

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