Just a quick note, both are valid ways of defining multi-line string, the 1st way is probably preferred as you can indent your strings
const char* str1 = "This "
"is"
"a "
"sentence";
const char* str2 = "This \
is\
a \
sentence";
void main() {
printf("%s\n", str1);
printf("%s\n", str2);
}