After computations, these are the number of digits in the result that are known with some degree of reliability.
RULES OF SIGNFICANT FIGURES
All nonzero digits are significant
RULES OF SIGNIFICANT FIGURES
Zeros between nonzero digits are significant
RULES OF SIGNIFICANT FIGURES
Zeros before nonzero digits at the start of the number are NOT significant.
RULES OF SIGNIFICANT FIGURES
Zeros after nonzero digits at the end of the number, when they are at the right of the decimal point, are significant.
example: in 21.5700, there are 6 significant figures
RULES OF SIGNIFICANT FIGURES
Zeros after nonzero digits at the end of the number, when they are at the left of a decimal point, MAY BE significant; to reduce the ambiguity if these numbers are significant, it is recommended to always use scientific notation for these large numbers.
