sql "case when" usage

---Usage one:
SELECT
            CASE WHEN STATE = '1' THEN 'success'
                 WHEN STATE = '2' THEN 'failure'
            ELSE 'other' END  
            FROM SYS_SCHEDULER
---Usage two:    
SELECT STATE
            CASE WHEN '1' THEN ' SUCCESS'
                 WHEN '2' THEN 'FAIL'
            ELSE 'Other' END  
            FROM SYS_SCHEDULER