in a function my answer is 'S=-102'. after that further more i cannot take answers , it give error massage saying

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answer ==== S=-102 ''Attempted to access (-102); index must be a positive integer or logical.'' why is this and what is the solution for this.
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Geoff Hayes
Geoff Hayes on 4 Oct 2016
shashika - given the error message, it sounds like you are trying to use S (which is negative) as an index into array. Perhaps something like
As the error message states, the index must be a positive integer or logical. Your S is negative so using this value to access an element in an array does not make sense. You need either to guard against using a negative index or ensure that the code which initializes S only does so with valid positive integers.

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