在Lua编程内嵌if-else语句,这意味着可以使用一个 if 或 else if 在另一个语句if或else if 语句中。
语法
if语句的嵌套语法如下:
复制代码 代码如下:
if( boolean_expression 1)
then
--[ Executes when the boolean expression 1 is true --]
if(boolean_expression 2)
then
--[ Executes when the boolean expression 2 is true --]
end
end
then
--[ Executes when the boolean expression 1 is true --]
if(boolean_expression 2)
then
--[ Executes when the boolean expression 2 is true --]
end
end
您可以嵌套else if...else 以类似if语句的方式。
例子:
复制代码 代码如下:
--[ local variable definition --]
a = 100;
b = 200;
--[ check the boolean condition --]
if( a == 100 )
then
--[ if condition is true then check the following --]
if( b == 200 )
then
--[ if condition is true then print the following --]
print("Value of a is 100 and b is 200" );
end
end
print("Exact value of a is :", a );
print("Exact value of b is :", b );
当建立和运行上面的代码,它会产生以下结果。
复制代码 代码如下:
Value of a is 100 and b is 200
Exact value of a is : 100
Exact value of b is : 200
Exact value of a is : 100
Exact value of b is : 200