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scanf() returns number of receiving arguments successfully assigned or EOF in case of failure.
Read more about scanf() here.
In context of your program, when you give input 5 the scanf() successfully assign it to receiving argument i and since the receiving argument is 1, scanf() is returning 1 which is getting printed. Hence you are getting output 1.
Try to give a character as input and check the output.
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solved Using scanf funciton in printf to get values