Reference

16.1Reset and clear memory#

16.2Number range and precision#

• Whole numbers and fractions are exact and can have thousands of digits (for example $100!$ is shown in full).
• Decimal answers use ordinary double precision (about 15 digits). The display shows up to 12 significant digits.
• Results beyond about $1.8\times 10^{308}$ show as ∞. An exact power with more than 4000 digits is turned into a decimal or ∞.
• The history keeps 60 entries.
• Large and small decimals are shown in 1.E20 style.

Example 16.1

A long factorial stays exact

1. Type 70! and press enter.

   70ctrl!xenter

16.3What is not included#

• Step-by-step solutions: answers are shown without the working.
• Programs and scripts: you can define functions with Define, but there are no multi-line programs or editors.
• Spreadsheet, data tables, regression and statistics plots, and a table of function values.
• Differential equation solving, trig expansion such as expanding sin(2x), and sorting lists.
• Inequality, implicit, 3D and slope-field graphs, and shading under curves.
• Unit conversions and physical constants.
• Indexing into a list or matrix with square brackets, and a variable list with types.
• Separate documents with several pages: there is one calculator page and one graphs page.