Return empty string as True in given string

def first_and_last(message):
        if (message[0] == message[3]):
            return True
        elif (message[0] != message[3]):
            return False


 print(first_and_last("else"))
 print(first_and_last("tree"))
 print(first_and_last(""))

I want to return True if string is empty ,True if 1st and last letter of string match and False if does not match however I have written code about 2 scenarios but I don't know how to get empty string as true kindly assist.

You can use if not message: to check if the message variable is empty.

You could, for example, do as follow :

def first_and_last(message):
    if not message:
        return True
    elif (message[0] == message[3]):
            return True
    elif (message[0] != message[3]):
            return False


print(first_and_last("else"))
print(first_and_last("tree"))
print(first_and_last(""))

Return empty string as True in given string, You can use the strict equality operator ( === ) to check whether a string is empty or not. The comparsion str === "" will only return true if the data type of the value� Java.lang.String.isEmpty () String method checks whether a String is empty or not. This method returns true if the given string is empty, else it returns false. The isEmpty () method of String class is included in java string since JDK 1.6. In other words, you can say that this method returns true if the length of the string is 0.

How to Check for an Empty String in JavaScript, --Returns true if the specified String is white space, empty (''), or null; otherwise, returns false. AppleScript[edit]. -- assign empty string to str set� Given a string in Python. The task is to check whether the string has at least one letter(character) and one number. Return “True” if the given string full fill above condition else return “False” (without quotes).

You can use if not

def first_and_last(message):
if not message:
    return False
else: return True


print(first_and_last("else")) #True
print(first_and_last("tree")) #True
print(first_and_last("")) #False

Empty string, So we can use the if condition for checking whether a given string is Using not operator with the string will return True if the string is empty. The simplest is this: [code]function isString(value) { if (typeof value === "string") { return true; } return false; } [/code]Trouble is, if someone has gone and

You can check if the string is empty with bool(message). And check the last item with message[-1]:

def first_and_last(message):
    if not message:
        return True
    elif (message[0] == message[-1]):
        return True
    else:
        return False


print(first_and_last("else")) # Returns True
print(first_and_last("tree")) # Returns False
print(first_and_last("")) # Returns True

How to check for an empty string in Python?, However, the above program doesn't return empty if a string contains only whitespace trim() which removes all leading and trailing whitespace characters in the given string. So, now if a string contains spaces only, the function returns true . Return the number of times that the string “code” appears anywhere in the given string Tag: python , string Return the number of times that the string "code" appears anywhere in the given string, except we'll accept any letter for the 'd' , so "cope" and "cooe" count.

Use:

if not message:

This will return true if the string is empty:

def first_and_last(message):
        if not message:
            return True
        if (message[0] == message[3]):
            return True
        elif (message[0] != message[3]):
            return False


print(first_and_last("else"))
print(first_and_last("tree"))
print(first_and_last(""))

Java Program to Check if a String is Empty or Null, 1. String isBlank() Method. This method returns true if the given string is empty or contains only white space code points, otherwise false� Given a string, return a string length 1 from its front, unless front is false, in which case return a string length 1 from its back. The string will be non-empty. theEnd ("Hello", true) → "H" theEnd ("Hello", false) → "o"

String isBlank(), This function checks whether the string is empty or not. Function returns a Boolean value either true or false. Syntax. Consider a string str. Syntax would be:. Given a string and an integer k, find the kth sub-string when all the sub-strings are sorted according to the given condition Find the lexicographically largest palindromic Subsequence of a String Count maximum occurrence of subsequence in string such that indices in subsequence is in A.P.

C++ String empty() function, If you definition of empty String also includes null then you can also use Apache Commons Lang's StringUtils class. It has methods like isEmpty() which return true � Given a string, return a string length 1 from its front, unless front is false, in which case return a string length 1 from its back. The string will be non-empty. theEnd("Hello", true) → "H"

Right way to check if String is empty in Java, Returns whether the string is empty (i.e. whether its length is 0). This function does not modify the Return Value. true if the string length is 0, false otherwise. This class is a * collection of static functions, and the usage is: * * StringUtil.method() * * it is not allowed to create instances of this class */ public class StringUtil { private static final String HT = "\t"; private static final String CRLF = "\r "; /** * Returns true if the given string is null or empty.

Comments
  • if (message == ''): return True is an option. What do you think?
  • Do you want to compare with the last character or the fourth? if it's the former, you should use [-1] instead of [3]. If you use [3] then first_and_last("abcad") will return True
  • Don't hard code [3], as OP wants the first and last characters, use [-1]
  • @DeepSpace I don't hard code [3]. I took back the code the author provided to solution the problem. I don't think it's necessary to comment all the posts in the answers to notice the same thing. howerver, you can fully notify the author of the post that the last character in a python list/str... is returned by the [-1] call.
  • Why not just use: return not message or message[0] == message[-1]? That returns boolean too!
  • @AjitZero perfectly correct (and I'll add it), I originally felt it was pushing it a bit too much
  • @DeepSpace kindly look into this Question as well if you can abel to help stackoverflow.com/questions/60139211/…
  • if bool(...) is redundant. Just if not message is sufficient
  • Also, don't hard code [3], as OP wants the first and last characters, use [-1]
  • hello @DeepSpace thank you for your suggestion i am newbie in python so just getting started :) i will improve
  • Don't hard code [3], as OP wants the first and last characters, use [-1]