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This code insight shows that Unused variables can cause risks in code

Counts one violation each time local variable is initialized but never used. bad

def area(width, height):
    a = width * height
    # todo: implement logging using variable a
    return width * height

good

def area(width, height):
    return width * height

 

Why you should care

A local variable in your function is not being used. This is usually caused when someone starts implementing a function but never finishes it, or someone has refactored a function but forgot to remove old parts of the function that are no longer used. Therefore you should go back and review the function to make sure it has no problems.

Business Impacts

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CAST recommendations

References

https://www.quantifiedcode.com/knowledge-base/correctness/Local%20variable%20assigned%20but%20never%20used/5GJ6uvk0 [nz_btn text="See features" link="http://casthighlight.wpengine.com/outputs-analytics/" target="_self" icon="icon-stats" animate="false" animation_type="ghost" color="black" size="small" shape="rounded" type="normal" hover_normal="fill" hover_ghost="fill"][nz_btn text="How it works" link="http://casthighlight.wpengine.com/how-it-works/" target="_self" icon="icon-cog" animate="false" animation_type="ghost" color="black" size="small" shape="rounded" type="ghost" hover_normal="fill" hover_ghost="fill"]