WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000355747
<NAME> SMITH BARNEY INVESTMENT FUNDS INC.
<SERIES>
   <NUMBER> 3
   <NAME> SMITH BARNEY PREMIER SELECTIONS FUND - CLASS B

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          APR-30-2000
<PERIOD-END>                               APR-30-2000
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<INVESTMENTS-AT-VALUE>                     782,546,706
<RECEIVABLES>                                3,164,836
<ASSETS-OTHER>                                     137
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             785,711,679
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,834,096
<TOTAL-LIABILITIES>                          1,834,096
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<PAID-IN-CAPITAL-COMMON>                   725,032,301
<SHARES-COMMON-STOCK>                       28,415,157
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
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<OTHER-INCOME>                                       0
<EXPENSES-NET>                               8,960,420
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<APPREC-INCREASE-CURRENT>                   53,271,735
<NET-CHANGE-FROM-OPS>                       58,845,282
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
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<SHARES-REINVESTED>                                  0
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<PER-SHARE-NAV-BEGIN>                            11.40
<PER-SHARE-NII>                                 (0.04)
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<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.28
<EXPENSE-RATIO>                                   1.94


</TABLE>