DecimalForm

DecimalForm[expr] prints with approximate real numbers in expr always given in decimal form, without scientific notation.

DecimalForm[expr,n] prints with approximate real numbers given in decimal form to n-digit precision.

DecimalForm[expr,{n,f}] prints with approximate real numbers having n digits, with f digits to the right of the decimal point.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.