LCD

lcd.setCursor(0,2);
lcd.print(line_percentage);
lcd.print("%");

when this code print in LCD give three number such as( 100%) and when give two number (85%%) and when give one number (0%%%)
i need to out (100%) & (85%) & (0%)

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Why not just print a space in front if 'x' is less than 100 and two if it is less than 10?

Or clear the line with spaces first…

lcd.print("         ");

Or put a couple of spaces on end of line that prints percentage

lcd.print("%  ");

JimboZA:
Or clear the line with spaces first…

lcd.print("         ");

Doesn’t the liquidCrystal library include a clear function? Something like lcd.clear();?

Let’s not use the library clear. It clears the whole screen and when used improperly it flickers the screen. All you need it to do this:

if (number<10) lcd.print("  "); // two spaces
if ((number>=10)&&(number<100)) lcd.print(" ");// one space
lcd.print(number);
lcd.print("%");

Just print two spaces after the number if you don't mind it being left-justified. That will clear any left-over from a previous, larger, number.

liudr:
Let’s not use the library clear. It clears the whole screen and when used improperly it flickers the screen. All you need it to do this:

if (number<10) lcd.print("  "); // two spaces

if ((number>=10)&&(number<100)) lcd.print(" “);// one space
lcd.print(number);
lcd.print(”%");

In case you want to switch to zero-padded numbers like 010%, you can just replace space with 0 :wink:

liudr:
All you need it to do this:

if (number<10) lcd.print("  "); // two spaces

if ((number>=10)&&(number<100)) lcd.print(" “);// one space
lcd.print(number);
lcd.print(”%");

Seems overly complex.
Why not use:

if (number <100) lcd.print(" "); // space instead of 100's
if (number < 10) lcd.print(" "); // space instead of 10s
lcd.print(number);
lcd.print("%");

— bill

I just assumed whoever asks this type of question only has basic programming skills and try to minimize my time to explain why the code so I wrote in very plain but unoptimized style ;)

Could you try using the modulo operator ‘%’ ?
For example,

{
  if ((val)%100 < 10) {
    lcd.print(" ");
    lcd.print(val);
  }
  else {
    lcd.print(val);
}

Might have to play around to get it right

Could you try using the modulo operator '%' ? For example,

The modulo operator is noticeable by its absence in your example.

Ahh, sorry. Fixed it