MYSQL - How to use UPDATE with IF-ELSE condition

I have three columns - id, programname, status

I wanted to use UPDATE with IF condition something like this:

UPDATE elec_products
        IF(programname ='Argos')      
        (
            SET status = 1   
        )
        ELSEIF(programname ='sify')
        (
            SET status = 2  
        )
        ELSE
        (
            SET status = 3  
        )
        ENDIF
WHERE programname IS NOT NULL

Code (markup):

I am not sure if it'll be possible. Please suggest the best possible ways to do this.
Thank you

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