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Statements provide a convenient method to execute conditional or repetitive operations. The syntax is C/C++/Java like, so things should be easy to grasp.
The if-else statement offers support for conditionally executing operations.
The general syntax for this is:
Note: the else branch can be omitted
The for statement provides a compact way to iterate over a range of values. Programmers often refer to it as the for loop because it repeatedly loops until a particular condition is satisfied.
In SIL the for statement has two forms:
- the standard for or simply for form
- the foreach form
The standard form
Similar to C, C++ or Java of the for statement can be expressed as follows:
For this first form, the <init> can be an attribution of an already defined variable or a definition for a new variable.
The foreach form
The foreach form can be expressed as follows:
Example 1 (standard form)
Prints the numbers from 0 to 9*
Example 2 (foreach form)
Prints the list of the watchers of a specific issue*
The while statement offers support for repeated executions. This form evaluates the condition first and then executes the instructions in the body.
The do-while statement is similar to the while statement, except the condition is evaluated after the execution of the encapsulated block. So,even if the condition is false, the instructions will still be evaluated once.
The general syntax:
The switch statement offers support for executing different operations depending on the value of a variable. The variable can be either a number or a string.
The general syntax:
Note: the default branch can be omitted as well as the break statements.
The break statement can be used in the following situations:
- inside a loop (for, while): when encountering the break, the execution of the loop is terminated and the control is transferred to the statement that follows the loop;
- in switch statements: when a case is followed by a break, it does not execute subsequent cases and control is transferred out of the switch statement.
The continue statement is used inside a loop(for, while) causing it to jump to the next iteration, skipping the execution of the rest of the statements inside the loop for the current iteration.