Word length c что это

The Standard doesn’t know this «word» thingy used by processors. But it says the type «int» should have the natural size for a execution environment. But even for 64 bit environments, int is usually only 32 bits. So «word» in Standard terms has pretty much no common meaning (except for the common English «word» of course).

Character size is the size of a character. Depends on what character you talk about. Character types are char, unsigned char and signed char. Also wchar_t is used to store characters that can have any size (determined by the implementation — but must use one of the integer types as its underlying type. Much like enumerations), while char/signed char or unsigned char has to have one byte. That means that one byte has as much bits as one char has. If an implementation says one object of type char has 16 bits, then a byte has 16 bits too.

Now a byte is the size that one char occupies. It’s a unit, not some specific type. There is not much more about it, just that it is the unit that you can access memory. I.e you do not have pointer access to bit-fields, but you have access to units starting at one byte.

«Integer size» now is pretty wide. What do you mean? All of bool, char, short, int, long and their unsinged counterparts are integers. Their range is what i would call «integer size» and it is documented in the C standard — taken over by the C++ Standard. For signed char the range is from -127 <-> 127, for short and int it is the same and is -2^15+1 <-> 2^15-1 and for long it is -2^31+1 <-> 2^31-1. Their unsigned counterparts range from 0 up to 2^8-1, 2^16-1 and 2^32-1 respectively. Those are however minimal sizes. That is, an int may not have maximal size 2^14 on any platform, because that is less than 2^15-1 of course. It follows for those values that a minimum of bits is required. For char that is 8, for short/int that is 16 and for long that is 32. Two’s-complement representation for negative numbers is not required, which is why the negative value is not -128 instead of -127 for example for signed char.

How to get string length in C#?

To get the string length in C#, use the .Length property.

For example:

Examples

What is String Length in C#?

String Length in C# is a property on the String object that returns the number of characters in a string. The returned length value is of type Int32.

The Length property of a string is the number of Char objects it contains, not the number of Unicode characters.

The length property returns the number of Char objects instead of the number of Unicode characters because a Unicode character might be represented by more than one character.

What is the max string length in C#?

The maximum string length in C# is 2^31 characters. That’s because String.Length is a 32-bit integer.

How to change string length in C#?

You can’t change the string length in C#. The String.Length property is read-only.

To change the string length, you need to create a new string.

If you try to change the Length property, you will get an error:

error CS0200: Property or indexer 'string.Length' cannot be assigned to -- it is read only

How to access each Unicode character?

To access each Unicode character in a C# string, you use the System.Globalization.StringInfo class to work with each Unicode character instead of each character.

Exception

One of the most frequent null-reference exceptions is with String.Length property.

If you try to access the Length property on a null string, you will get a NullReferenceException.

Many developers forget to check for null before accessing the Length property.

Index vs Length

In C#, string length returns the number of characters in a string.

The index property returns the zero-based position of the character that is located at a specified location within an instance of String.

The length property doesn’t start at 0. It starts at the first character in the string. But the index property starts at 0.

Under the hood

Internally, C# stores strings as a read-only collection of Char objects. There’s also a null-terminating character at the end of a C# string.

C# doesn’t count the null-terminating character in the length of a string. The null-character is just a way C# marks the end of a string under the hood.

Termination

Programming languages have different approaches to determine the string end:

• Null-terminated — Strings in C are null-terminated sequences of characters, with a special character following the last character—written «» — to show the end of the string.
• Length-prefixed -Pascal stores the length in the first bytes of the string.
• Length-and-Character Array — String as a structure with an array of characters, and stores the length in a separate allocation.

Changes in length

Programming languages have different approaches to handle changes in string length:

• Static string length is fixed and cannot be changed at runtime.
• Limited Dynamic string length can be increased or decreased, but the number of characters that can be stored in it is limited.
• Dynamic string length can grow or shrink as needed, up to the maximum size allowed by the underlying system.

In C#, strings have dynamic string length. It means that the string can grow or shrink as needed.

String class

The String class holds the implementation details and the string manipulation functionality. Looking at the source code, we can see that the string length is crucial for the string class.

Functionality such as String.Substring, String.IndexOf, and String.Remove require the length of a string in order to work correctly.

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In this program, we will learn how to count length of each word in a string in C language?

There are many string manipulation programs and string user defined functions, this is an another program in which we will learn to count the length of each word in given string.

In this exercise (C program) we will read a string, like «Hi there how are you?» and it will print the word length of each word like 2, 5, 3, 3, 4.

Input
Hi there how are you?Output
2, 5, 3, 3, 4

Program to count length of each word in a string in C

#include <stdio.h>
#define MAX_WORDS	10

int main()
{
	
	char text[100]={0}; // to store string
	int cnt[MAX_WORDS]={0}; //to store length of the words
	int len=0,i=0,j=0;
	
	//read string
	printf("Enter a string: ");
	scanf("%[^n]s",text); //to read string with spaces
	
	while(1)
	{
		if(text[i]==' ' || text[i]=='')
		{
			//check NULL
			if(text[i]=='')
			{
				if(len>0)
				{
					cnt[j++]=len;
					len=0;
				}
				break; //terminate the loop
			}
			cnt[j++]=len;
			len=0;
		}
		else
		{
			len++;
		}		
		i++;
	}
	
	printf("Words length:n");
	for(i=0;i<j;i++)
	{
		printf("%d, ",cnt[i]);
	}
	printf("bb n"); //to remove last comma
	
	return 0;
}

Output

Enter a string: Hi there how are you?
Words length:
2, 5, 3, 3, 4

C String Programs »