char charA = 'A';
// A string in C is a char array ending with '\0'.
char stringA[] = {charA, '\0'};
//stringA is "A"
char str[16];
snprintf(str, sizeof str, "character %c", charA);
//str is "character A"
printf("stringA is %s\n", stringA);
printf("str is %s\n", str);