for loop¶

Use for to implement a conditional loop.

syntax:

(for (code_block_1) conditional_expression (code_block_3)
        code_block_2
)

code_block_1 is executed once. while conditional expression evaluates to be TRUE (non zero), code_block_2 and then code_block_3 is executed.

Example using the for statement - prints ”.” on the screen 20 times:

(for ((= i 0)) (< i 20) ((++ i))
        (Display "." dsCOLOR clLIME)
)

It is important to note that the conditional_expression is not enclosed in parentheses (unless it is an expression other than a plain value), while code_block_1 and code_block_3 are enclosed in parentheses. This is because the code blocks may contain multiple statements. For example:

; This loop starts with i = 5 and j = 6, and will execute 6 times.
(for ((= i 5) (= j 6)) (or i j) ((-- i) (-- j))
        (Printf "i: %d, j: %d" i j)
)
; Prints out:
; i: 5, j: 6
; i: 4, j: 5
; i: 3, j: 4
; i: 2, j: 3
; i: 1, j: 2
; i: 0, j: 1