Penny (Irish decimal coin) from 2002 on its own). Penny (Irish decimal coin) The decimal one penny (1p) () coin was the second smallest denomination of the Irish pound. It was first issued when the Irish currency was decimalised on Decimal Day, 15 February 1971. It was the second of three new designs introduced all in bronze, the others being a half-penny and a two pence coin. All featured ornamental birds designed by Irish artist Gabriel Hayes on the reverse. The coin originally had a diameter of 2.032 centimetres and mass of 3.564 grams consisting of copper, tin and zinc. This was identical to
Decimal to the left of the decimal separator (see also truncation). For a nonnegative decimal, it is the largest integer that is not greater than the decimal. The part from the decimal separator to the right is the "fractional part", which equals the difference between the numeral and its integer part. When the integral part of a numeral is zero, it may occur, typically in computing, that the integer part is not written (for example , instead of ). In normal writing, this is generally avoided because of the risk of confusion between the decimal mark and other punctuation. Decimal numerals