Mega Code Archive

Single - the smallest capacity and precision floating point type

type Single; Description The Single type is the fastest floating point type in Delphi. It also has the lowest storage requirements - 32 bits (1 for the sign 8 for the exponent, and 23 for the mantissa). It supports approximately 7 digits of precision in a range from 1.18 x 10-38 to 3.4 x 1038. Notes The Double type is the general purpose floating point type, being higher in capacity and precision than the Single. It takes more storage and is slower however. The Extended type has the highest capacity and precision, but biggest storage and worst performance. A Single set to its highest value is treated as Infinity. Related commands Currency A floating point type with 4 decimals used for financial values Double A floating point type supporting about 15 digits of precision Extended The floating point type with the highest capacity and precision Example code : Showing the precision and capacity of Single values var account1, account2, account3, account4 : Single; begin account1 := 0.1234567890123456789; // 20 decimal places account2 := 1.18E-38; // Lowest exponent value account3 := 3.4E38; // Highest exponent value account4 := 3.49E38; // Treated as infinite ShowMessage('Account1 = '+FloatToStr(account1)); ShowMessage('Account2 = '+FloatToStr(account2)); ShowMessage('Account3 = '+FloatToStr(account3)); ShowMessage('Account4 = '+FloatToStr(account4)); end; Show full unit code Account1 = 0.123456791043282 Account2 = 1.17999994577463E-38 Account3 = 3.39999995214436E38 Account4 = INF