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Table of Contents

...

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Contents

Table of Contents


Excerpt

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.

If-Else Statement

...

The if-else statement offers support for conditionally executing operations.

...

Code Block
if (isNotNull(fixVersions) and affectedVersions == {"1.1"})
{
    affectedVersions = {"1.1", "1.0" , "1.2"};
    fixVersions = {"1.2" , "1.2" , "1.3"} ;
}
else
{
    affectedVersions = {"1.1"};
    fixVersions = {"1.0"};
}

...


For Statement
The for statement provides a compact way to iterate over a range of values. Programmers often refer to it as the for loop because of the way in which it repeatedly loops until a particular condition is satisfied.
 
 
 Tip
In SIL the for statement has two forms:
  • the standard for or simply for form
  • the foreach form
...
Similar to C, C++ or Java of the for statement can be expressed as follows:
 Code Block
for(<init>; <condition>; <increment>){
   Instruction1;
   ...
   InstructionN;
}

 Note
For this first form, the <init> can be an attribution of an already defined variable or a definition for a new variable.
...
 Code Block
for(<variable_definition> in #{array}){
   Instruction1;
   ...
   InstructionN;
}

Examples 
Example 1 (standard form)
...
 Code Block
for(string user in watchers){
   print(user);
}

While Statement 
The while statement offers support for repeated executions. This form evaluates the condition first and then executes the instructions in the body.
...
 Code Block
number i = 1;
while(i <= 3) {
    multisel = arrayAddElement(multisel,"value" + i);
    i = i + 1;
}

 
...
Do-While Statement
...
The do-while statement is similar to the while statement, except that 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.
 
Syntax
The general syntax is:
 Code Block
do {
    Instruction1;
    ...
    InstructionN;
} while(condition);

...
 Code Block
number i = 1;
string [] people;
do {
    people += watchers[i];
    i = i + 1;
} while(i < 5);


Switch Statement
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.
Syntax
The general syntax:
 Code Block
switch(variable) {
    case value1:
		Instruction11;
		...
		Instruction1N;	
	[break;] 
    case value2:
		Instruction21;
		...
		Instruction2N;
	[break;]
	...
	case valueN:
		InstructionM1;
		...
		InstructionMN;
	[break;]
	[default:
		InstructionDef1;
		...
		InstructionDefN;]
}
 Note
Note: the default branch can be omitted as well as the break statements.
Example
 Code Block
switch (season) {
    case "Summer":
        print("It's too hot!");
        break;
    case "Winter":
        print("It's too cold!");
        break;
    default:
        print("It's just fine!");
}
Break Statement
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.
Example
 Code Block
for (number i = 0; i < 10; i = i + 1) {
   if (i >= 5) {
	  break;
   }
   print(i);
}
Continue 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.
Example
 Code Block
number i = 1;
while (i <= 10) {
	if (i % 3 == 0) {
		i = i + 1;
		continue;
	}
	print(i);
	i = i + 1;
}
See also