@Anjali Singh why did you copy the tests code? Please use the initial code:

def number_to_string(num):
    # Return a string of the number here!

Probably you forfeited the kata. Not the same problem as the OP one.

same with me ia am using python but it is showing wrong

Your solution has a bug, it fails for some very specific inputs. It even fails example tests, which you can see and inspect.

Your solution being buggy is not a kata issue.

the code has been updated recently

• copy your code (so you don't lose it)
• refresh the page
• click reset
• paste in your code
• try again

I seem to be getting an error from the testing code. I am using C, and it does not recognize the tester() method.

The errors:

/tmp/fixture-06cea8.o: In function `Fixed_cases_should_return_number_as_string_impl':

fixture.c:(.text+0x31): undefined reference to `tester'

fixture.c:(.text+0x45): undefined reference to `tester'

fixture.c:(.text+0x59): undefined reference to `tester'

fixture.c:(.text+0x6d): undefined reference to `tester'

fixture.c:(.text+0x81): undefined reference to `tester'

/tmp/fixture-06cea8.o:fixture.c:(.text+0x95): more undefined references to `tester' follow
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Code in the testing file:
#include <criterion/criterion.h>

extern void tester(int number, const char* expected);

Test(Fixed_cases, should_return_number_as_string) {

tester(          0,           "0");

tester(          1,           "1");

tester(         -7,          "-7");

tester(      99999,       "99999");

tester(       -273,        "-273");

tester(      2 + 2,           "4");

tester(      6 * 7,          "42");

tester(    10 - 10,           "0");

tester( 2147483647,  "2147483647");

tester(-2147483647, "-2147483647");

}