Remove a trailing comma in java-CodePudding

int number = 4;

while(number <= 100)
{
   System.out.println(number   ",");
   number  = 2;
}

I tried to do it myself but couldn't I search the internet but only found removing commas for Strings only I need to lose the last comma at 100

CodePudding user response：

You cannot remove characters from System.out that you already printed. Instead of trying to remove the last comma, do not print it in the first place. E.g.

int number = 4;
while (number < 100) {
  System.out.println(number   ",");
  number  = 2;
}
System.out.println(number   "");
number  = 2; // this increment is only necessary depending on what you do after the loop

Note the adjusted condition in the loop.

CodePudding user response：

int number = 4;

while(number <= 100)
{
  if(number > 4) {
    System.out.print(",");
  }

  System.out.println(number);
  number  = 2;
}