C#•3y ago

Hexadecimal format specifier not working

for(int X = 1 ; X <= 5 ; X++)
{
    var F = Math.Pow(63, X);
    Console.WriteLine($"{F:X}");
}

for(int X = 1 ; X <= 5 ; X++)
{
    var F = Math.Pow(63, X);
    Console.WriteLine($"{F:X}");
}

For some reason this is not working and I receive an error: FormatException: Format specifier was invalid.

4 Replies

?OP•3y ago

And even if I try F.ToString("X") it's also not working

mtreit•3y ago

It's because your variable F is a floating point number. It needs to be an integer. Also don't use capital letters for variable names.

MODiX•3y ago

mtreit#6470

REPL Result: Success

for (int x = 1; x <= 5; x++)
{
    var f = (int)Math.Pow(63, x);
    Console.WriteLine($"0x{f:X}");
}

for (int x = 1; x <= 5; x++)
{
    var f = (int)Math.Pow(63, x);
    Console.WriteLine($"0x{f:X}");
}

Console Output

0x3F
0xF81
0x3D0BF
0xF05F01
0x3B27613F

0x3F
0xF81
0x3D0BF
0xF05F01
0x3B27613F

Compile: 648.175ms | Execution: 85.741ms | React with ❌ to remove this embed.

?OP•3y ago

Okay, that worked! I didn't know it works only for integers, thanks!