text: Program to check if matrix is upper triangular | Java script Program to check upper triangular matrix . ; Function to check matrix is in upper triangular form or not . ; driver function
code: let N = 4 ; function isUpperTriangularMatrix ( mat ) { for ( let i = 1 ; i < N ; i ++ ) for ( let j = 0 ; j < i ; j ++ ) if ( mat [ i ] [ j ] != 0 ) return false ; return true ; } let mat = [ [ 1 , 3 , 5 , 3 ] , [ 0 , 4 , 6 , 2 ] , [ 0 , 0 , 2 , 5 ] , [ 0 , 0 , 0 , 6 ] ] ; if ( isUpperTriangularMatrix ( mat ) ) document . write ( " " ) ; else document . write ( " " ) ;