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
Send
20
Autoscroll Show timestamp
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

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