How I to turn this ''loop while'' in ''loop for''? var i = 0; while (i < 20) { var lineY = 20 + (i * 20); line(0, lineY, 400, lineY); i++; }

for(i = 0; i<20;i++){

lineY = 20 + (i * 20);

line(0, lineY, 400, lineY) }

Explanation:

First declare and initialize the variable i. You have not specified the data type of i so if the data type of i is integer i.e. int then you should declare i variable in the for loop as for(int i = 0; i<20;i++)

So the given while loop has a variable i which is initialized to 0. Then while(i<20) means that while loop executes until the value of i exceeds 20. If this while condition is true then the two statements inside its body will execute. The two statements are: lineY = 20 + (i * 20);

line(0, lineY, 400, lineY);

The value of i ins incremented after each iteration i.e. i++

So while loop has the following syntax"

1) initialization;  >  i = 0

2) while(condition) {  > i<20

3) loop body >  lineY = 20 + (i * 20); line(0, lineY, 400, lineY);

4) increment or decrement loop variable  } > i++

For loop has the following syntax:

for( initialization of loop variable ; condition; decrement/increment loop variable)  {

loop body }

Here:

initialization  >  i = 0

condition        > i<20

loop body     > lineY = 20 + (i * 20); line(0, lineY, 400, lineY);

increment or decrement loop variable  >  i++

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