Printing an empty string in c

Question

Why does this program print those symbols?

#include <stdio.h>

int main() {
char txt[20];
puts(txt);
return 0;
}

Output: @@

Answer 1

Prasun Adhikari this happens because when you try to display txt[] then in the memory it was having some values(in your case @@) on your device. Such type of values are known as GARBAGE VALUES
So it is essential to initialise the variables you declare otherwise they contain some garbage values like this