Regex for password must contain at least eight characters, at least one number and both lower and uppercase letters and special characters

Question

I want a regular expression to check that:

A password contains at least eight characters, including at least one number and includes both lower and uppercase letter

Answer 1

Try this one:

1. Minimum six characters
2. At least one uppercase character
3. At least one lowercase character
4. At least one special character

Expression:

"/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&.])[A-Za-z\d$@$!%*?&.]{6, 20}/"

Optional Special Characters:

1. At least one special character
2. At least one number
3. Special characters are optional
4. Minimum six characters and maximum 16 characters

Expression:

"/^(?=.*\d)(?=.*[a-zA-Z]).{6,20}$/"

If the min and max condition is not required then remove .{6, 16}

• 6 is minimum character limit
• 20 is maximum character limit
• ?= means match expression