Conditional Statements in X++

Conditional Statements in X++: if, else, switch and Ternary Operator

The conditional statements in X++ are explained in this article. The ternary operator (?), switch, if, and if…else are the conditional statements. Conditional statements are used to indicate whether a block of code is run or not. In certain circumstances, different conditional statements provide benefits.

if and if…else statements

The if statement allows you to check if a condition is true, and if so, execute a block of code. If the condition evaluates to false, the code block is skipped.

int amount = 100;
if (amount > 50)
{
info("Amount is greater than 50");
}

In this example, the message “Amount is greater than 50” will be displayed because the condition amount > 50 is true.

The `else` Statement in X++

You can use the else statement to define an alternative block of code that executes if the condition in the if statement evaluates to false.

Example:

int age = 16;
if (age >= 18)
{
info("You are eligible to vote.");
}
else
{
info("You are not eligible to vote.");
}

Here, since the age is less than 18, the output will be “You are not eligible to vote.

The `switch` Statement in X++

The switch statement is useful when you have multiple conditions to check against the same variable. It’s an alternative to using multiple if-else statements, making the code more readable and efficient when there are many conditions.

int day = 3;
switch (day)
{
case 1:
info("Monday");
break;
case 2:
info("Tuesday");
break;
case 3:
info("Wednesday");
break;
default:
info("Invalid day");
}

If you do not use the break statement, the program flow in the switch statement continues into the next case. Code segments A and B have the same behavior.

// Code segment A (break omitted)
case 13:
case 17:
case 21:
case 500:
info("g");
break;

// Code segment B (the values are comma-delimited)
case 13, 17, 21, 500;
info("g");
break;

Ternary operator (?)

The ternary operator is a shorthand way of writing an if-else statement in a single line. It is useful when you need to assign a value based on a condition, and you want to do it concisely.

int age = 16;
string eligibility = (age >= 18) ? "Eligible to vote" : "Not eligible to vote";
info(eligibility);

In this example, the eligibility variable will be assigned the value "Not eligible to vote" because the condition age >= 18 is false.

The ternary operator simplifies the code, especially for simple condition checks where you don’t need to perform complex operations.

Conclusion

Condition statements in X++ are essential for making decisions in your code. By using if, else, switch, and the ternary operator, you can control the flow of execution and create more dynamic and responsive applications in Microsoft Dynamics 365 Finance and Operations.

If you have further questions or want additional examples of any of these statements, feel free to reach out or leave a comment below!

Conditional Statements in X++