The []() is an inbuilt method in Ruby returns the element at the i-th row and the j-th column.
Syntax: mat1[i, j]
Parameters: The function needs the row number i and column number j whose position element is to be returned.
Return Value: It returns the element at the position mat[i][j].
Example 1:
# Ruby program for [] method in Matrix # Include matrix require "matrix"
# Initialize a matrix mat1 = Matrix[[1, 21], [31, 18]]
# Print the element at 1,1 puts mat1[1, 1]
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Output:
18
Example 2:
# Ruby program for [] method in Matrix # Include matrix require "matrix"
# Initialize a matrix mat1 = Matrix[[89 , 12, 12], [8, 5, 23], [1, 2, 9]]
# Print the element at 2,3 puts mat1[2, 2]
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Output:
9