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Ruby | Math ldexp() function

  • Last Updated : 07 Jan, 2020

The ldexp() function in Ruby returns the value of fraction * (2^exponent) when fraction and exponent are given as parameters. The fraction is a float value and the exponent is an integer.

Syntax: Math.ldexp(fraction, exponent)

Parameter: The function takes two mandatory parameter fraction and exponent which specifies the fraction and exponent whose result is returned.

Return Value: The function returns the value of fraction and exponent.

Example 1:






# Ruby program for ldexp() function 
  
# Assigning values
fraction1, exponent1 = Math.frexp(189) 
  
fraction2, exponent2 = Math.frexp(19) 
  
fraction3, exponent3 = Math.frexp(18) 
  
fraction4, exponent4 = Math.frexp(123) 
  
# Prints the value returned by ldexp() 
puts Math.ldexp(fraction1, exponent1)
  
puts Math.ldexp(fraction2, exponent2)
  
puts Math.ldexp(fraction3, exponent3)
  
puts Math.ldexp(fraction4, exponent4)

Output:

189.0
19.0
18.0
123.0

Example 2:




# Ruby program for ldexp() function 
  
# Assigning values
fraction1, exponent1 = Math.frexp(23) 
  
fraction2, exponent2 = Math.frexp(27) 
  
fraction3, exponent3 = Math.frexp(1092) 
  
fraction4, exponent4 = Math.frexp(1087) 
  
# Prints the value returned by ldexp() 
puts Math.ldexp(fraction1, exponent1)
  
puts Math.ldexp(fraction2, exponent2)
  
puts Math.ldexp(fraction3, exponent3)
  
puts Math.ldexp(fraction4, exponent4)

Output:

23.0
27.0
1092.0
1087.0

Reference: https://devdocs.io/ruby~2.5/math#method-c-ldexp




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