Ive got an empty string s = "";
Ive got a char b = '0';
char b is in a loop so changes after every, I want to keep adding that char b to the string s,
For example, after the first loop string s = "0" after second round s = "01"
In Java its simple to do that for an empty string with string s += char b; Couldnt find anything like that on C#, is there an easier way than building a string builder or making a dummy string?
What you describe works in C#:
string x = "";
x += 'Z';
Console.WriteLine(x); // Prints "Z"
Or in a loop:
string x = "";
char b = '@';
for (int i = 0; i < 10; ++i)
{
++b;
x += b;
Console.WriteLine(x); // Prints "A", then "AB", then "ABC" etc.
}
However, you should use StringBuilder for efficiency.
The same loop as above using StringBuilder:
StringBuilder x = new StringBuilder();
char b = '@';
for (int i = 0; i < 10; ++i)
{
++b;
x.Append(b);
Console.WriteLine(x); // Prints "A", then "AB", then "ABC" etc.
}
Easy, but not efficient (String s constantly re-creaing):
char b = '0';
for (int i = 0; i < n; ++i)
s += (Char)(b + i);
Better choice is to use StringBuilder:
char b = '0';
StringBuilder sb = new StringBuilder(n);
for (int i = 0; i < n; ++i)
sb.Append((Char)(b + i));
s = sb.ToString();
StringBuilder. Concatenating to astringin a loop is a bad idea as it can cause performance issues from creating a bunch of temporystringobjects.StringBuilder?string += charworks in C#, too; if you are having issues please post your exact code.