Conditionals

This topic describes the if statement. The if statement is used to write pieces of code that should 

only be executed under certain circumstances (conditions). Here is an example:

if 

a > 

3

b = 

2

else

b = 

1

a = 

2

endif

In this code snippet, b is given the value 2 when a is greater than 3, otherwise b is given the value 

1, and a is given the value 2. 

Here is the complete syntax of the if statement:

if 

[

elseif 

  ]

[

else

]

endif

The parts between brackets [ ] are optional. There can be as many elseif blocks as you find useful. 

Here is an example which finds the largest of three variables a, b and c and places it in x:

if 

a > b && a > c

  x = a

elseif 

b > c

  x = b

else

x = c

endif

The usage of elseif is not really necessary. The following example does exactly the same thing:

if 

a > b && a > c

  x = a

else

  if 

b > c

    x = b

else

x = c

endif

endif

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