C-----------------------------------------------------------------------
C IMSL Name:  CHI/DCHI (Single/Double precision version)
C
C Purpose:    Evaluate the hyperbolic cosine integral.
C
C Usage:      CHI(X)
C
C Example 1:
C                                  Declare variables
      INTEGER    NOUT
      REAL       CHI, VALUE, X
      EXTERNAL   CHI, UMACH
C                                  Compute
      X     = 2.5
      VALUE = CHI(X)
C                                  Print the results
      CALL UMACH (2, NOUT)
      WRITE (NOUT,99999) X, VALUE
99999 FORMAT (' CHI(', F6.3, ') = ', F6.3)
      END
C  CHI( 2.500) =  3.524