How to convert string variable to integer in Arduino
How to convert a string variable to int, long in Arduino code?
Answer
There are two types of string: String() object and char array.
- If you uses String() object, call myString.toInt()
void setup() {
Serial.begin(9600);
String myString = "125";
int myInt = myString.toInt();
Serial.println(myInt);
}
void loop() {
}
8
Serial.println("Hello World!");
Message (Enter to send message to 'Arduino Uno' on 'COM15')
New Line
9600 baud
125
- If it's a char array, call atoi(myString) .
void setup() {
Serial.begin(9600);
char myString[6] = "126";
int myInt = atoi(myString);
Serial.println(myInt);
}
void loop() {
}
8
Serial.println("Hello World!");
Message (Enter to send message to 'Arduino Uno' on 'COM15')
New Line
9600 baud
126
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