Tcl 嵌套 If 语句
在 Tcl 中,嵌套 if-else 语句是合法的,这意味着你可以在另一个 if 或 else if 语句中使用一个 if 或 else if 语句。
语法
嵌套 if 语句的语法如下所示 –
if { boolean_expression 1 } {
# Executes when the boolean expression 1 is true
if {boolean_expression 2} {
# Executes when the boolean expression 2 is true
}
}
您可以像嵌套if语句一样嵌套else if…else:
示例:
#!/usr/bin/tclsh
set a 100
set b 200
# check the boolean condition
if { a == 100 } {
# if condition is true then check the following if {b == 200 } {
#if condition is true then print the following
puts "Value of a is 100 and b is 200"
}
}
puts "Exact value of a is : a"
puts "Exact value of b is :b"
当上述代码被编译并执行时,会产生以下结果 −
Value of a is 100 and b is 200
Exact value of a is : 100
Exact value of b is : 200