The upper_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.upper_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:
# Ruby program for upper_triangular?() method in Matrix # Include matrix require "matrix"
# Initialize a matrix mat1 = Matrix[[ 1 , 21 ], [ 31 , 18 ]]
# Prints if upper_triangular or not puts mat1.upper_triangular?() |
Output:
false
Example 2:
# Ruby program for upper_triangular?() method in Matrix # Include matrix require "matrix"
# Initialize a matrix mat1 = Matrix[[ 31 , 18 , 19 ], [ 0 , 3 , 2 ], [ 0 , 0 , 1 ]]
# Prints if upper_triangular or not puts mat1.upper_triangular?() |
Output:
true