how to create string

Projects Programming
1

How can i covert two char into string?
I have matrix keyboard,from keyboard i get single char (ex,1,2,A) but i want to get it like A1,A2.B1.two charecters as input.because i can't control my 12th number LED by keyboard

2 
char text[3];

void setup() {
  Serial.begin(250000);
  text[0] = 'A';
  text[1] = '1';
  Serial.print(F("combined chars \""));
  Serial.print(text);
  Serial.println(F("\""));
}
void loop() {}

combined chars "A1"
3

It might help understand the example if you know that declaring the array as a global initialises each of its elements to zero. Thus when elements 0 and 1 are set to 'A' and '1' respectively the zero is still in element 2 which fulfills the requirement that a C style string, which is an array of chars, is terminated with a zero

4 
char text[3];

void setup() {
  Serial.begin(250000);
  text[0] = 'A';
  text[1] = '1';
  text[2] = 0;
  Serial.print(F("combined chars \""));
  Serial.print(text);
  Serial.println(F("\""));
}
void loop() {}
5

Even better thanks