An expression specifying the number of meaningful digits used to express the
value of a measured quantity.
Same as accurate to n significant figures.
For example, e = 2.71828 ... = 2.718 is rounded to four significant digits, and
2.72 to three significant digits.
→ accurate to n decimal places.

1) Having a special or suggestive → meaning.
2) Statistics: Of or pertaining to a result that is not plausible to occur
by chance.

From L. significant-, stem of significans, from
significare, "to → signify."

Nešânâr, from nešân, → sign, +
âr short form of âvar present stem of âvardan
"to bring, adduce, cause, produce."

significant digit

رقم ِ نشانار

raqam-e nešânâr

Fr.: chiffre significatif

The number of digits used to express a measured or calculated quantity.
Rules for deciding the number of significant digits:
The leftmost digit which is not a zero is the most significant digit.
If the number does not have a decimal point, the rightmost digit which is not a zero is
the least significant digit.
If the number does have a decimal point, the rightmost significant digit is the
least significant digit, even if it's a zero.
Every digit between the least and most significant digits should be
counted as a significant digit.