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Task/Identity-matrix/FreeBASIC/identity-matrix.freebasic

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+' FB 1.05.0 Win64
+
+Dim As Integer n
+
+Do
+  Input "Enter size of matrix "; n
+Loop Until n > 0
+
+Dim identity(1 To n, 1 To n) As Integer '' all zero by default
+
+' enter 1s in diagonal elements
+For i As Integer =  1 To n
+  identity(i, i) = 1
+Next
+
+' print identity matrix if n < 40
+Print
+
+If n < 40 Then
+  For i As Integer = 1 To n
+    For j As Integer = 1 To n
+      Print identity(i, j);
+    Next j
+    Print
+  Next i
+Else
+  Print "Matrix is too big to display on 80 column console"
+End If
+
+Print
+Print "Press any key to quit"
+Sleep