am trying to build a regex code to allow such texts

iGuKiscdvMrrSCaKGdmePT5ASu6gRJBHoB
iPokbyeGPuF46B27dAY3fRZAkKdDh8WbNr
iJhZPxQp7fWQCBvmyTFLAFs9Q8kWWEJHfi
iKs7Kv9gaLCoJVXvnPkqf4peXFqZrCG1G4
iJRXgmaiwQ5r6NnxDcFgT2yBpjtWB1y5vM

starts with letter i and contain numbers and letters a-z A-z with no special characters
what is the correct regex

>Solution :

Looks like you’re looking for the regex

^i[A-za-z0-9]+$

Where the ^ means that the line is starting, the i is literal, [A-za-z0-9]+ includes at least one upper and lowercase alphanumeric character(s), and the $ means that the line is ending.

You can learn more about this and test the regex easily at https://regex101.com/r/7Mzxt2/1