Simulink function block to multiply a signal with -1 if its negative

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Is it possible that I can use a block in Simulink to set conditions that if this signal which is going to be a numerical is less than 0 than simulation multiplies it by -1 to convert it to positive?
Or have two function blocks one for a positive number and one negative and depending on the number simulation takes two different paths?
Thanks for the help

Accepted Answer

Chandrasekhar on 4 Apr 2014
find the attached logic

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