Conditionals 2.

We extend the language of conditionals from the previous example by adding the keyword “else”. This allows conditionals to ask two or more sequential questions, each with a different action.

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size(640, 360);
background(0);

for (int i = 2; i < width-2; i += 2) {
  // If 'i' divides by 20 with no remainder
  if ((i % 20) == 0) {
    stroke(255);
    line(i, 80, i, height/2);
    // If 'i' divides by 10 with no remainder
  } else if ((i % 10) == 0) {
    stroke(153);
    line(i, 20, i, 180); 
    // If neither of the above two conditions are met
    // then draw this line
  } else {  
    stroke(102);
    line(i, height/2, i, height-20);
  }
}

Functions Used

stroke()

Sets the color used to draw lines and borders around shapes

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size()

Defines the dimension of the display window width and height in units of pixels

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line()

Draws a line (a direct path between two points) to the screen

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background()

The background() function sets the color used for the background of the Processing window

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