text: Program to find Normal and Trace of a matrix | Size of given matrix ; Returns Normal of a matrix of size n x n ; Returns trace of a matrix of size n x n ; Driver Code
code: < ? php $ MAX = 100 ; function findNormal ( $ mat , $ n ) { $ sum = 0 ; for ( $ i = 0 ; $ i < $ n ; $ i ++ ) for ( $ j = 0 ; $ j < $ n ; $ j ++ ) $ sum += $ mat [ $ i ] [ $ j ] * $ mat [ $ i ] [ $ j ] ; return floor ( sqrt ( $ sum ) ) ; } function findTrace ( $ mat , $ n ) { $ sum = 0 ; for ( $ i = 0 ; $ i < $ n ; $ i ++ ) $ sum += $ mat [ $ i ] [ $ i ] ; return $ sum ; } $ mat = array ( array ( 1 , 1 , 1 , 1 , 1 ) , array ( 2 , 2 , 2 , 2 , 2 ) , array ( 3 , 3 , 3 , 3 , 3 ) , array ( 4 , 4 , 4 , 4 , 4 ) , array ( 5 , 5 , 5 , 5 , 5 ) ) ; echo " Trace ▁ of ▁ Matrix ▁ = ▁ " , findTrace ( $ mat , 5 ) , " STRNEWLINE " ; echo " Normal ▁ of ▁ Matrix ▁ = ▁ " , findNormal ( $ mat , 5 ) ; ? >