How to use blynk_write

hi there can i use the value from blynk_write i loop
i want to compare value from two slid wigets
}
BLYNK_WRITE(V3)

{
int value = param.asInt(); // Get value as integer

// The param can contain multiple values, in such case:
int val = param[0].asInt();
return(val);
}
BLYNK_WRITE(V1)
{
int value = param.asInt(); // Get value as integer

// The param can contain multiple values, in such case:
int rit = param[0].asInt();
return(rit);
}

BLYNK_WRITE(V0)
{
int value = param.asInt(); // Get value as integer

// The param can contain multiple values, in such case:
int lft = param[0].asInt();
return(lft);
}

void loop()
{
Blynk.run();
if(rit>900&&lft>900)
{
int car(val,rit,lft)

}

}

Please format your code correctly

``` cpp
CODE
```