In the function vpa(‘981’,10), why do we put 981 within inverted commas?

Correct Answer: We do it to get the exact value as MATLAB computes exact values, of numerical expressions, when declared within a string
Variable precision arithmetic in MATLAB is perfected by computing exact values and exact values are evaluated if the numerical expression is within a string. By not placing the pair of inverted commas, we get a floating point approximated value.