Use the system;
Use the system. Assemble. Generics;
Use the system. Linq
Use the system. Text;
Namespace ConsoleApplication 1
{
Class plan
{
Static void Main(string[] args)
{
for(int I = 1； I<= 100; i++) {
//Calculate the square and print.
Square of the console. writeline(I . tostring()+":"+(I * I)。 ToString())；
//Calculate the square root and print it.
The square root of console.writeline (i.tostring ()+":"+math). Sqrt(i)。 ToString())；
//natural logarithm
The natural logarithm of console.writeline (i.tostring ()+":"+math). Log (I, math. e)。 ToString())；
//E index not found.
}
Console. ReadLine()；
}
}
}
I don't quite understand the e index, and I haven't found anything related to it in mathematical methods. . .