Ruby | Numeric arg() function

The arg() is an inbuilt method in Ruby returns 0 if the number is positive, else it returns a float value which is equal to pi. 

Syntax: num.arg()

Parameters: The function needs a number. 

Return Value: It returns 0 if the number is positive, else it returns a float value which is equal to pi. .

Example 1: 

Ruby

# Ruby program for arg() method in Numeric

# Initialize a number
num = -19

# Prints arg() of num
puts  num.arg()

Output: 

3.141592653589793

Example 2: 

Ruby

# Ruby program for arg() method in Numeric

# Initialize a number
num = 100

# Prints arg() of num
puts  num.arg()

Output: 

0