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Return statement in Dart Programming
There are certain cases where we want to return a value from a given function so that we can use it later. These return values make use of a return keyword which in turn allows a function to return values.
It should be noted that the return statement is optional, if not specified the function returns null.
Also, only one return statement is allowed in a function.
Syntax
return <expression/value>;
Syntax of a Dart function with a return value −
returnType funcName(){
// statement(s)
return value;
}In the above syntax, the funcName is replaced with the name of our function. The returnType represents the type of data/expression we are returning from the function.
Example
Let's take an example where we make use of the function which returns a value in a dart program.
Consider the example shown below −
void main(){
var x = 10;
var y = callFunction(x);
print(y);
}
int callFunction(var x){
return x + 10;
}In the above example, we are returning a value of type int from a function named callFunction and then we use that value inside the main function.
Output
20
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