Conditionals 1.

Conditionals 1.

Conditions are like questions. They allow a program to decide to take one action if the answer to a question is “true” or to do another action if the answer to the question is “false.” The questions asked within a program are always logical or relational statements. For example, if the variable ‘i’ is equal to zero then draw a line.

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

for(int i = 10; i < width; i += 10) {
  // If 'i' divides by 20 with no remainder draw 
  // the first line, else draw the second line
  if((i % 20) == 0) {
    stroke(255);
    line(i, 80, i, height/2);
  } else {
    stroke(153);
    line(i, 20, i, 180); 
  }
}

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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if

Allows the program to make a decision about which code to execute

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for

Controls a sequence of repetitions

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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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