for structure usually use when you know how many times you will loop
Simple for structures:
for <time counts> times
<tasks to do repeatedly>
<tasks to do repeatedly> could be single command or block
$_time is a var that hold the loop time, starting with 1.
Ex: Write 3 time “I’ll never play games in classes.”, with number:
for 3 times
@echo $_time + “. I’ll never play games in classes.”
> 1. I’ll never play games in classes.
> 2. I’ll never play games in classes.
> 3. I’ll never play games in classes.
You could also use at keyword here
Ex: Write 4 time “I’ll never play games in classes.”, at time 3, write “This is time 3” :
for 3 times
@echo $_time+”. I’ll never play games in classes.”
at $_time = 3
” This is time 3″
> 1. I’ll never play games in classes.
> 2. I’ll never play games in classes.
> 3. I’ll never play games in classes. This is time 3
You could replace times with any variable:
for 3 $i:
for 3 $j:
if $j = $i:
@echo ‘ * ’
else:
@echo ‘ ’
@echo “\n” //new line
> *
> *
> *
Full for structures:
for <initation>,<break_condition>,<increasement>
<tasks to do repeatedly>
Ex: Write 3 time “I’ll never play games in classes, with number”:
for $i:1,$i<3,$i++
@echo ($i+1)”. I’ll never play games in classes.”
> 1. I’ll never play games in classes.
> 2. I’ll never play games in classes.
> 3. I’ll never play games in classes.
For-in with arrays
You could iterate through elements in array and do actions for each of those element musing for and in.
for <element’s value holding var> in <array>
<action for each element>
In case you need both the key and the value of each element:
for < element’s key holding var> => <element’s value holding var> in <array>
<action for each element>
Ex: write out all name in an array which is a list of names.
$list:[“Annie”,”Bob”, “John”, “Sabrina”]
for $name in $list
@echo $name + “\n” // \n is the end of output line.
> Annie
> Bob
> John
> Sabrina
>
Now, write out all name in an array which is a list of names with it’s index.
$list : [“Annie”,”Bob”, “John”, “Sabrina”]
for $index => $name in $list
@echo $index + “. ” + $name + “\n
> 1. Annie
> 2. Bob
> 3. John
> 4. Sabrina
>
Foreach
foreach $list, $k, $v:
foreach $list, $v:
foreach $list:
$_k, $_v