HP 49G: Challenge - Truncate a Long Real

[Karl-Ludwig Butte]

Hi Gerald,

you may use strings for truncating a long real, e.g:

5.12345678901
ENTER
->STR

this converts your real into the string "5.12345678901"

now enter:

1
ENTER
5
ENTER
SUB
ENTER

this truncates your string after the 5th charachter: "5.123"

The last step is to convert the string back to a real:

STR->
ENTER

This leaves 5.123 on Level 1 of the stack.
The only problem is that you need to know the number of charachters to the left of the decimal point because the SUB command strictly counts from left to right.

Hope this helps

Best regards

Karl