How regular expressions determine whether a number includes (-+), such as: -1,+1, this is also counted as a number regular expression how to determine whether a number includes (-+), such as: -1,+1, this is also counted as a number

Source: Internet
Author: User

Regular expression set for validating numbers
Verification Number: ^[0-9]*\$
To verify N-bit numbers: ^\d{n}\$
Verify that at least n digits: ^\d{n,}\$
Verify the number of m-n bits: ^\d{m,n}\$
Verify numbers starting with 0 and non 0: ^ (0|[ 1-9][0-9]*) \$
Verify that there is a positive real number with two decimal places: ^[0-9]+ (. [ 0-9]{2})? \$
Verify that there is a positive real number with 1-3 decimal places: ^[0-9]+ (. [ 0-9]{1,3})? \$
Verify non-zero positive integers: ^\+? [1-9] [0-9]*\$
To verify a nonzero negative integer: ^\-[1-9][0-9]*\$
Validates non-negative integers (positive integers + 0) ^\d+\$
Validates a non-positive integer (negative integer + 0) ^ ((-\d+) | ( 0+)) \$
Verify the character with a length of 3: ^. {3}\$
Validates a string consisting of 26 English letters: ^[a-za-z]+\$
Validates a string consisting of 26 uppercase English letters: ^[a-z]+\$
Validates a string consisting of 26 lowercase English letters: ^[a-z]+\$
Validates a string consisting of a number and 26 English letters: ^[a-za-z0-9]+\$
Validates a string consisting of a number, 26 letters, or underscores: ^\w+\$
Verify user password: ^[a-za-z]\w{5,17}\$ the correct format is: Start with a letter, the length is between 6-18, and can contain only characters, numbers, and underscores.
Verify that it contains ^%& ',; =?\$\ ' characters:[^%& ', =?\$\x22]+
Verify Kanji: ^[\u4e00-\u9fa5],{0,}\$
Verify email Address: ^\w+[-+.] \w+) *@\w+ ([-.] \w+) *\.\w+ ([-.] \w+) *\$
Verify interneturl:^http://([\w-]+\.) +[\w-]+ (/[\w-./?%&=]*)? \$; ^[a-za-z]+://(w+ (-w+) *) (. ( w+ (-w+) *) * (? s*)? \$
Verify the phone number: ^ (\ (\d{3,4}\) |\d{3,4}-)? \d{7,8}\$:--the correct format is: xxxx-xxxxxxx,xxxx-xxxxxxxx,xxx-xxxxxxx,xxx-xxxxxxxx,xxxxxxx, XXXXXXXX.
Verify your Social Security number (15-bit or 18-digit number): ^\d{15}|\d{}18\$
Validation 12 months of the year: ^ (0?[ 1-9]|1[0-2]) \$ correct format: "01"-"09" and "1" "12"
Verify one months of 31 days: ^ ((0?[ 1-9]) | ((1|2) [0-9]) |30|31) \$ The correct format is: 01, 09 and 1, 31.
Integer: ^-?\d+\$
Non-negative floating-point number (positive floating point + 0): ^\d+ (\.\d+)? \$
Positive floating-point number ^ ([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*)) \$
Non-positive floating-point number (negative floating point + 0) ^ ((-\d+ (\.\d+)?) | (0+ (\.0+)?)) \$
Negative floating-point number ^ (-([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*))) \$
Floating point ^ (-?\d+) (\.\d+)?

How regular expressions determine whether a number includes (-+), such as: -1,+1, this is also counted as a number regular expression how to determine whether a number includes (-+), such as: -1,+1, this is also counted as a number

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