使用指南

If the expression in parentheses is true, the operator/operators listed in curly brackets{} are executed. If the expression within brackets is false, then the operators in {} after the keyword else are used.

Example:

if(price<min && price>min)
{
	System.Print("Price is out of range");
}
else
{
	System.Print("Price is within the range");
}

The else keyword is optional.

The statement if-else may be used without curly brackets { and } , in this case, only the operator specified after if is executed.

Example:

if(a==5)
System.Print("a==5");
System.Print("regardless the value of a");