```    Program f07aufe

!     F07AUF Example Program Text

!     Mark 27.0 Release. NAG Copyright 2019.

!     .. Use Statements ..
Use nag_library, Only: nag_wp, x02ajf, zgecon, zgetrf, zlange => f06uaf
!     .. Implicit None Statement ..
Implicit None
!     .. Parameters ..
Integer, Parameter               :: nin = 5, nout = 6
Character (1), Parameter         :: norm = '1'
!     .. Local Scalars ..
Real (Kind=nag_wp)               :: anorm, rcond
Integer                          :: i, info, lda, n
!     .. Local Arrays ..
Complex (Kind=nag_wp), Allocatable :: a(:,:), work(:)
Real (Kind=nag_wp), Allocatable  :: rwork(:)
Integer, Allocatable             :: ipiv(:)
!     .. Executable Statements ..
Write (nout,*) 'F07AUF Example Program Results'
!     Skip heading in data file
lda = n
Allocate (a(lda,n),work(2*n),rwork(2*n),ipiv(n))

!     Read A from data file

!     Compute norm of A
!     f06uaf is the NAG name equivalent of the LAPACK auxiliary zlange
anorm = zlange(norm,n,n,a,lda,rwork)

!     Factorize A
!     The NAG name equivalent of zgetrf is f07arf
Call zgetrf(n,n,a,lda,ipiv,info)

Write (nout,*)
If (info==0) Then

!       Estimate condition number

!       The NAG name equivalent of zgecon is f07auf
Call zgecon(norm,n,a,lda,anorm,rcond,work,rwork,info)

If (rcond>=x02ajf()) Then
Write (nout,99999) 'Estimate of condition number =',                 &
1.0_nag_wp/rcond
Else
Write (nout,*) 'A is singular to working precision'
End If
Else
Write (nout,*) 'The factor U is singular'
End If

99999 Format (1X,A,1P,E10.2)
End Program f07aufe
```