What's an example of modifying the title/summary of an issue using REST API?

[Meng]

I need to programmatically change the summary/title of hundreds of issues/tickets according to some if-statement that I can implement in some programming language such as Bash or Java. What's an example of modifying the title/summary of an issue using REST API?

[Alexey Matveev]

You can find an example here

https://developer.atlassian.com/cloud/jira/platform/rest/#api-api-2-issue-issueIdOrKey-put