Ruby | Matrix lower_triangular? function

The lower_triangular?() is an inbuilt method in Ruby returns a boolean value. It returns true if it is a lower-triangular matrix, else it returns false.

Syntax: mat1.lower_triangular?()

Parameters: The function needs the matrix to be checked for lower-triangular.



Return Value: It returns true if it is a lower-triangular matrix, else it returns false.

Example 1:

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#Ruby program for lower_triangular ? () method in Matrix
  
#Include matrix
require "matrix"
  
#Initialize a matrix
    mat1
    = Matrix[[ 1, 21 ], [ 31, 18 ]]
  
#Prints if lower_triangular or not
      puts mat1.lower_triangular
    ? ()

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Output:

false

Example 2:

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#Ruby program for lower_triangular ? () method in Matrix
  
#Include matrix
require "matrix"
  
#Initialize a matrix
    mat1
    = Matrix[[ 1, 0, 0 ], [ 2, 3, 0 ], [ 31, 18, 19 ]]
  
#Prints if lower_triangular or not
      puts mat1.lower_triangular
    ? ()

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Output:

true


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