查看Char的源代码


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'''char()'''

<font color="orange" size="+1">'''描述'''</font>

Converts a value to the char data type. -- 



<font color="orange" size="+1">'''语法'''</font>

<pre style="color:dimgray">

return;

return value; // both forms are valid

</pre>


<font color="orange" size="+1">'''参数'''</font>

value: any variable or constant type


<font color="orange" size="+1">'''示例'''</font>

A function to compare a sensor input to a threshold

<pre style="color:dimgray">

 int checkSensor(){       
    if (analogRead(0) > 400) {
        return 1;
    else{
        return 0;
    }
}

</pre>

The return keyword is handy to test a section of code without having to "comment out" large sections of possibly buggy code.

<pre style="color:dimgray">

void loop(){

// brilliant code idea to test here

return;

// the rest of a dysfunctional sketch here
// this code will never be executed
}

</pre>

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