Rexx - If else statement


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The next decision-making statement is the if-else statement. An if statement can be followed by an optional else statement, which executes when the Boolean expression is false.

Syntax

The general form of this statement in Rexx is as follows. −

if (condition) then 
   do 
      #statement1 
      #statement2 
   end 
else 
   do 
      #statement3 
      #statement4 
   end 

In Rexx, the condition is an expression which evaluates to either true or false. If the condition is true, then the subsequent statements are executed. Else if the condition is evaluated to false, then the statements in the else condition are evaluated.

Flow Diagram

The flow diagram of the if-else statement is as follows −

If Else

From the above diagram, it can be noted that we have two code blocks. One gets executed if the condition is evaluated to true and the other if the code is evaluated to false.

The following program is an example of the simple if-else expression in Rexx.

Example

/* Main program */ 
i = 50 
if (i < 10) then 
   do 
      say "i is less than 10" 
   end  
else 
   do 
      say "i is greater than 10" 
   end 

The output of the above code will be −

i is greater than 10 
rexx_decision_making.htm
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