How to change letter on some position in the string?

[Guest]

How to change letter on some position in the string?

eg.

$word="This is my test string."

# 11111111111222# 12345678901234567890123

Change letter on 7 nth position to "X"

$word="This iX my test string."

# 11111111111222

# 12345678901234567890123

Or change letter on 15 nth position to "?"

$word="This is my tes? string."

# 11111111111222

# 12345678901234567890123



Thanks.


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Paul Rosenthal

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