The numerical errors are generated with the use of approximations to represent mathematical operations and quantity. These include truncation errors, which are from about exact mathematical procedure and the rounding errors that result from about exact numbers.
For both types of errors, the relationship between the exact result and the approximate or true is given by:Estimated value = true value + error
Numerical error is equal to the difference between the true value and approximate value, ie
Eu = true value - approximate value
Numerical error is equal to the difference between the true value and approximate value, ie
Eu = true value - approximate value
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