Type an expression. The answer follows.
EnterAdd a line and keep calculating
↑ / ↓Move between expressions
Ctrl / ⌘ + ZUndo; hold Shift to redo
ans × 2Use the previous valid result
a = 12Define a variable for later lines
2π / sqrt(4)Implicit multiplication and scientific notation work too
log(8, 2)Log base 2; log(100) uses base 10
root(27, 3)Nth roots; mean and stdev take comma-separated values
DEG uses degrees; RAD uses radians. Switching recalculates every line. % means divide by 100: 200 × 10% = 20.
IEEE 754 double precision; display uses 12 or 15 significant digits. Use parentheses to make ambiguous expressions explicit. Use a dot for decimals and a comma between function arguments in every language.
Jiansuan
Room to think.