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Questions tagged [char]

char refers to the character data-type, representing letters, digits, punctuation marks, control characters, etc. Use this tag for questions relating to and usage of the character data-type.

The keyword char is used in many programming languages, often defining a 1-byte memory location representing ASCII, UTF-8, UTF-16, UTF-32, and ISO-8895-1 character encodings. Arrays of characters can create Strings used to form words, descriptive text, or even extremely large numbers unable to be represented exactly by 32 or 64 bits.

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Why is char[] preferred over String for passwords?

In Swing, the password field has a getPassword() (returns char[]) method instead of the usual getText() (returns String) method. Similarly, I have come across a suggestion not to use String to handle passwords. Why does String pose a threat to…
Ahamed
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How to convert a std::string to const char* or char*

How can I convert an std::string to a char* or a const char*?
user37875
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How to convert a char to a String?

I have a char and I need a String. How do I convert from one to the other?
Landon Kuhn
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What is the difference between char s[] and char *s?

In C, one can use a string literal in a declaration like this: char s[] = "hello"; or like this: char *s = "hello"; So what is the difference? I want to know what actually happens in terms of storage duration, both at compile and run time.
user188276
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What is an unsigned char?

In C/C++, what an unsigned char is used for? How is it different from a regular char?
Landon Kuhn
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.NET / C# - Convert char[] to string

What is the proper way to turn a char[] into a string? The ToString() method from an array of characters doesn't do the trick.
BuddyJoe
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std::string to char*

I want to convert a std::string into a char* or char[] data type. std::string str = "string"; char* chr = str; Results in: “error: cannot convert ‘std::string’ to ‘char’ ...”. What methods are there available to do this?
user1598585
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How to convert a char array back to a string?

I have a char array: char[] a = {'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd'}; My current solution is to do String b = new String(a); But surely there is a better way of doing this?
chutsu
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How can I convert a character to a integer in Python, and viceversa?

I want to get, given a character, its ASCII value. For example, for the character a, I want to get 97, and vice versa.
Manuel Araoz
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Delete last char of string

I am retrieving a lot of information in a list, linked to a database and I want to create a string of groups, for someone who is connected to the website. I use this to test but this is not dynamic, so it is really bad: string strgroupids = "6"; I…
Kiwimoisi
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Why is there no Char.Empty like String.Empty?

Is there a reason for this? I am asking because if you needed to use lots of empty chars then you get into the same situation as you would when you use lots of empty strings. Edit: The reason for this usage was this: myString.Replace ('c', '') So…
Joan Venge
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How to convert a char array to a string?

Converting a C++ string to a char array is pretty straightorward using the c_str function of string and then doing strcpy. However, how to do the opposite? I have a char array like: char arr[ ] = "This is a test"; to be converted back to: string str…
RajSanpui
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Why is conversion from string constant to 'char*' valid in C but invalid in C++

The C++11 Standard (ISO/IEC 14882:2011) says in § C.1.1: char* p = "abc"; // valid in C, invalid in C++ For the C++ it's OK as a pointer to a String Literal is harmful since any attempt to modify it leads to a crash. But why is it valid in C? The…
rullof
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Single quotes vs. double quotes in C or C++

When should I use single quotes and double quotes in C or C++ programming?
Vishwanath Dalvi
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How do I apply the for-each loop to every character in a String?

So I want to iterate for each character in a string. So I thought: for (char c : "xyz") but I get a compiler error: MyClass.java:20: foreach not applicable to expression type How can I do this?
Frames Catherine White
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