# 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

See also: if statements, while statement, repeat statement, break and breakif statements.