What is the logic behind while loop behavior in this case?

Question

My code simply Creates a refrence variable of StreamReader object that reads a TextFile After that using a while loop to retrive data from the TextFile. StreamReader sr = new StreamReader( File.txt ); string line =  ; while (line != null ) { line = sr.ReadLine(); Console.WriteLine(line); } So forgive my innocent question : The condition in the While loop is TRUE  so why it doesn't return an infinite loop ? instead it retrives the data from File.txt then it breaks the loop? All what I know as a newbie programmer is that if the condition of the loop is TRUE keep it going until it turns to FALSE then the loop will break; itself. Could somebody explain the logic behind this scenario please!

Ramesh Palanivel · Answer

Hi kal kal The below Line performing as increment section. Like int i=0; while(i { //statement body ++i;//Increment section } StreamReader sr = new StreamReader( File.txt ); string line =  ; while (line != null ) { line = sr.ReadLine(); //This is the increment section reading the line from text file until the line is empty or null Console.WriteLine(line); }

Kal Kal · Answer

Thanks Ramesh Your answer opened a next door for me. I have tried this logic on another simple code to approve it my self. So I come with this... string [] names = new string [] { aaa  bbb  ccc  ddd  null }; string line =  ; int i = 0; while (line != null ) { line = names[i]; Console.WriteLine(line); i++; } Considering that retriving the indexed elements from an array has the same process of what sr.ReadLine() method does except that incrementing it via i++ has been done implicitly on the original code. Thank you again for your cooporation.