Calculator Guide

Logarithms

Hissab supports natural log, base-10 log, and base-2 log.

Forms

  • Natural log — log 20
  • Natural log aliases — ln 20, loge 20
  • Log base 10 — log10 20
  • Log base 2 — log2 20
log 20
ln 20
loge 20
log10 20
log2 20

log is base e (the same as ln), not base 10. Use log10 when you want base 10.

Change of base

For another base, use the identity log(x) / log(base).

log 343 / log 7

Examples

log2 1024
log10 1000
log 100

Common mistakes

  • log 1000 returns 6.9078, not 3 — log is the natural log. Use log10 1000 for base 10.
  • -log10 0.00001 is invalid as a leading negation on a prefix function. Calculate the log first, then negate separately if needed.