How do I find the match % of two texts?

MIT App Inventor Help
1

Hello inventors !
How do I find the match % of two texts ?
I mean -

Text1 = a
Text2 = a
Match% = 100%
Text1 = ab
Text2 = ac
Match% = 50%
Text1 = qwerty
Text2 = asdfgh
Match% = 0%



Thanks !
2

I think the easiest way is to use a loop and test each character in Text1 to see if there is a matching character in Text2. Increment the record of matches.

Text1 = abcdefg
Text2 = zcdehw

Number of chars in Text1 = 7
Number of matching chars in Text2 = 3

7/100 = 0.07
3/0.07 = 43% (rounded up)

3
4

Text1 = abc
Text2 = aaa
match% = ? %

Text1 = abc
Text2 = abbccd
match% = ? %

Also: Do the texts have to be the same length?

5

The original post is ambiguous.

Do matches have to be at the same location?

6

No. It can be of different length.

7

Then answer my other questions:

8

In other words, which matching algorithm should be used here?