Regular Expression for minimum value 18 and maximum 99 with leading zero

Question

Regular Expression for minimum value 18 and maximum 99 with leading zero. Means my number should be from 18 to 99. With one condition of leading zero i.e 18 == 018, 99 == 099

Answer 1

Try this it will help you

Less than 18 and greater than 99 is not allowed

^(1[89]|[2-9][0-9])$

Answer 2

^0?1[89]|0?[2-9][0-9]$

• ^ - beginning of string
• 0? - allow beginning 0
• 1[89] - match first character 1 and second 8 or 9
• | - or
• 0? - allow beginning 0
• [2-9] - match first character 2-9
• [0-9] - match second character 0-9
• $ - end of string