![]() ![]() c_str() to convert it to a NUL-terminated char* which can be printed directly: Serial.println(str. In Arduino, if you have a std::string: serial-println-a-stdstring.cpp Copy to clipboard Download std::string str 'test' you can’t directly print it trying to do so leads to the following error messages: serial-println-a-stdstring.txt Copy to clipboard Download src/main. ![]() Size_t println(const _FlashStringHelper note: no known conversion for argument 1 from 'std::_cxx11::string' to 'const note: candidate: 'size_t Print::println(const String&)' The remaining prints start appearing in a new line. You can try this example for yourself to see it for yourself Serial.println() will simulate hitting enter key on the keyboard. println() starts the successive print to the serial terminal in a new line. In file included from note: candidate: 'size_t Print::println(const _FlashStringHelper*)' Both Serial.print() and Serial.println() will print the data to the serial terminal. Src/main.cpp:122:22: error: no matching function for call to 'HardwareSerial::println(std::_cxx11::string&)' But it was chosen for Arduino because, back then, no other language was efficient enough to run on such on such humble hardware. You can’t directly print it – trying to do so leads to the following error messages: src/main.cpp: In function 'void setup()': data: the data to print (char, byte, int, long, or string) BASE: (optional) the base in which to print numbers: BIN for binary (base 2), DEC for decimal (base 10), OCT for octal (base 8), HEX for hexadecimal (base 16). Serial.println('The dice rolled a ' + String(random(1, num + 1))) should also fix it C can be tricky It's not an ideal language for beginners. In Arduino, if you have a std::string: std::string str = "test" ![]()
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