How can I parse a string using bash to get a number

Question

I have the following string:

PR-1769|7bb12d4152a497cef491e0a1088b3984ad92972f|jaga|

How can I parse the string above using bash so that I get t

Answer 1

Based on posted,

by using grep

echo 'PR-1769|7bb12d4152a497cef491e0a1088b3984ad92972f|marvel|' | grep -Po "(PR-)([0-9]+)" | grep -Po "[0-9]+"

1. the string is being echoed and redirected to grep for the first time

2. in first iteration grep is extracting and outputting PR-1769

3. PR-1769 is in second iteration redirected to grep again, now 1769 is extracted and outputted

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This is only first-shot version of solution, some grep regex expert would certainly know how to do it with single grep call.

It will only give you result if echoed string is in PR-NUMBER format, as you have presented.