Python's print "0"*5 equivalent in C#

Question

When I need to print "00000", I can use "0"*5 in python. Is there equivalent in C# without looping?

Answer 1

One of the String ctor overloads will do this for you:

string zeros = new String('0', 5);

Answer 2

Based on your example I figure you're going to be using these strings to help zero-pad some numbers. If that's the case, it would be easier to use the String.PadLeft() method to do your padding. You could be using the similar function in python as well, rjust().

e.g.,

var str = "5";
var padded = str.PadLeft(8, '0'); // pad the string to 8 characters, filling in '0's
// padded = "00000005"

Otherwise if you need a repeated sequence of strings, you'd want to use the String.Concat() method in conjunction with the Enumerable.Repeat() method. Using the string constructor only allows repetition of a single character.

e.g.,

var chr = '0';
var repeatedChr = new String(chr, 8);
// repeatedChr = "00000000";
var str = "ha";
// var repeatedStr = new String(str, 5); // error, no equivalent
var repeated = String.Concat(Enumerable.Repeat(str, 5));
// repeated = "hahahahaha"

Answer 3

To add to the other answers, you won't be able to use this string constructor with another string to repeat strings, such as string s = new string("O", 5);. This only works with chars.

However, you can use Enumerable.Repeat() after adding using System.Linq; to achieve the desired result with strings.

string s = string.Concat(Enumerable.Repeat("O", 5));

Answer 4

Use

 string s = new string( '0', 5 );

Found here

Answer 5

Depending on your application, this may be useful too:

int n = 0;
string s = n.ToString().PadRight(5, '0');

Answer 6

Don't ever, ever use this: string.Join("0", new string[6]);

Why not just "00000" ?! ducks

Answer 7

This one only works with zero: 0.ToString("D5");