Description:
Repeats a group of statements a specified number of times.
Syntax:
for (statement1; statement2; statement3)
{
[statements]
[break;]
}
The
for statement consists of three parts separated by semicolon:
statement1 - Specifies the initial numeric value of the variable used as cycle counter. For example:
statement2 - Logical expression that is evaluated ata the beginning of each cycle iteration. If the expression returns
true, then the iteration is completed, otherwise the cycle is exited.
It is usualy a simpe test whether the cycle counter is within the defined range.
For example:
i < 20
statement3 - This statement is executed at the end of each iteration. It is usualy an incrementation (or decrementation) of corresponding cycle variable. For example:
i++
Note:
break statement can be used inside a loop to provide an alternate way to exit.
For similar purpose in the
VBScript language is used the statement
For...Next.
Example1:
A simple cycle example. It dumps text
i=1 and
i=2 into the
Debug_info item of the INFO system.
JavaScriptSelect and copy to clipboard
var i;
for (i = 0; i < 2; i++)
{
//test
Pm.Debug("i=" + i);
}Example2:
You can nest For...Next loops by placing one For...Next loop within another. Give each loop a unique variable name as its counter. The following construction is correct:
JavaScriptSelect and copy to clipboard
var i, j, k;
for (i = 1; i < 3; i++)
{
for (j = 1; j < 3; j++)
{
for (k = 1; k < 3; k++)
{
//test
Pm.Debug("i=" + i + ", j=" + j + ", k=" + k);
}
}
}