If 示例（Crystal 语法）

假设某公司要大概计算出员工需缴纳的税额并写出适当的信息。收入低于八千美元不必纳税，收入介于八千美元和两万美元应缴纳 20%，收入介于两万美元和三万五千美元应缴纳 29%，而收入超过三万五千美元应缴纳 40%。

//If example 5
Local CurrencyVar tax := 0;
Local CurrencyVar income := {Employee.Salary};
Local StringVar message := "";
If income < 8000 Then
(
message := "no";
tax := 0
)
Else If income >= 8000 And income < 20000 Then
(
message := "lowest";
tax := (income - 8000)*0.20
)
Else If income >= 20000 And income < 35000 Then
(
message := "middle";
tax := (20000 - 8000)*0.20 + (income - 20000)*0.29
)
Else
(
message := "highest";
tax := (20000 - 8000)*0.20 + (35000 - 20000)*0.29 +
(income - 35000)*0.40
);
//Use 2 decimal places and the comma as a
//thousands separator
Local StringVar taxStr := CStr (tax, 2, ",");
"You are in the " & message & " tax bracket. " &
"Your estimated tax is " & taxStr & "."

注意: 使用变量简化了运算逻辑。当满足某个条件时执行两个表达式，一个给 tax 变量赋值，另一个给 message 变量赋值。满足某个条件时执行多个语句通常很有用。

Crystal Reports for Rational Application Developer 设计员指南

If 示例（Crystal 语法）