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String.toInt()
Description
Converts a valid String to an integer. The input String should start with an integer number. If the String contains non-integer numbers, the function will stop performing the conversion.
Syntax
myString.toInt()
Parameter Values
- myString: a variable of type String.
Return Values
- If no valid conversion could be performed because the String doesn't start with a integer number, a zero is returned. Data type: long.
Example Code
void setup() {
Serial.begin(9600);
String myString = "20";
long myInt = myString.toInt();
Serial.println(myInt);
}
void loop() {
}
The result on Serial Monitor:
COM6
20
Autoscroll
Clear output
9600 baud
Newline
※ NOTES AND WARNINGS:
If the string is modified, it is highly recommended using String.reserve() to prevent the memory fragmentation issue
See Also
- Language : Arduino - String
- Language : String.c_str()
- Language : String.charAt()
- Language : String.compareTo()
- Language : String.concat()
- Language : String.endsWith()
- Language : String.equals()
- Language : String.equalsIgnoreCase()
- Language : String.getBytes()
- Language : String.indexOf()
- Language : String.lastIndexOf()
- Language : String.length()
- Language : String.remove()
- Language : String.replace()
- Language : String.reserve()
- Language : String.setCharAt()
- Language : String.startsWith()
- Language : String.substring()
- Language : String.toCharArray()
- Language : String.toDouble()
- Language : String.toFloat()
- Language : String.toLowerCase()
- Language : String.toUpperCase()
- Language : String.trim()
- Example : String Tutorials
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