This is my first exercises on computer programming 2. To triangle shape asterisk or echo out triangle asterisk in a for loop sequence.
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*********Analyzing the output?
It could be 5 line break and so on
The number sequence of the asterisk is x = x+2
Here is the code for the number sequence.
$s=""; // initial variable
$b=9; // base number of the triangle
// execute loop if true
for($i=1;$i< =$b;$i+=2){
// make a line break
$s.=$i."
";
}
echo $s;The output number sequences we get from the for loop
1
3
5
7
9We already got the number of asterisk on each row.
Now we can print the asterisk accordingly.
$s=""; // initial variable
$b=9; // base number of the triangle
// execute loop if true
for($i=1;$i< =$b;$i+=2){
// store the string value of $s while the asterisk count is true
for($j=0;$j<$i;$j++){
$s .="*";
}
// make a line break
$s.=$i."
";
}
echo $s;The output of triangle asterisk using for loop.
*
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*********We add dash to indent the asterisk to center for the final code.
$s=""; // initial variable
$b=9; // base number of the triangle
// execute loop if true
for($i=1;$i< =$b;$i+=2){
// store and add dash on the string value of $s while it is true
// or $k is less than $b-$i
for ($k=0;$k<($b-$i); $k+=2){
$s .="-";
}
// store the string value of $s while the asterisk count is true
// or $j less than $i
for($j=0;$j<$i;$j++){
$s .="*";
}
// make a line break
$s.=$i."
";
}
echo $s;The output of triangle asterisk using for loop with indention.
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