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Ruby | Math erf() function

  • Last Updated : 07 Jan, 2020

The erf() function in Ruby returns the error function of x. It accepts value in the range [-inf, +inf] and returns value in the range [-1, +1].

Syntax: Math.erf(value)

Parameter: The function takes the value whose error function is to be returned.

Return Value: The function returns the error function.

Example 1:






# Ruby program for erf() function 
  
# Assigning values
val1 = 0.98
val2 = -0.9
val3 = 6
val4 = 1
  
# Prints the erf() value 
puts Math.erf(val1)
puts Math.erf(val2)
puts Math.erf(val3)
puts Math.erf(val4)

Output:

0.8342315043402079
-0.7969082124228322
1.0
0.8427007929497149

Example 2:




# Ruby program for erf() function 
  
# Assigning values
val1 = 0.67
val2 = -0.12
val3 = 2.4
val4 = 89
  
# Prints the erf() value 
puts Math.erf(val1)
puts Math.erf(val2)
puts Math.erf(val3)
puts Math.erf(val4)

Output:

0.6566277023003051
-0.13475835181992007
0.999311486103355
1.0

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

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