Thanks to everybody who responded.
It is kind of a theoretical or programing question.
I am sorry to not mention that the character was created for LCD display.
Instead of making three comands
lcd.print ("My friends I am ");
lcd.print (" today.");
I was planing to create a string With all three parts and then
Is the answer of majenko correct?, Yesterday I created a character with number 0, and tried
"bar " \x00);
it printed only the word bar.