Strange behaviour STRING command in case STRING(√7)

[Joe Horn]

(11-22-2016 04:51 PM)Jan_D Wrote:  I entered each command twice, the first time in lowercase, the second time in uppercase.

If you turn off Textbook Display (N.B. not Textbook Entry), the CAS history will show your commands in the case you typed them in (usually). This helps tremendously when trying to figure out which spelling does what.

Please note that mixed case sometimes acts differently than either uppercase or lowercase spelling. For example, in CAS, Sign() is more accurate than either sign() or SIGN(). Try all three on epsilon to see this (be sure to turn Textbook Display off!):

sign(epsilon) --> 0.
SIGN(epsilon) --> 0.
Sign(epsilon) --> 1.

Crazy, huh?