if() Control Conditionals Web & Application if_.gif for(int i=5; i<height; i+=5) { stroke(255); //Set the color to white if(i < 35) { //When "i" is less than "35"... stroke(0); //...set the color to black } line(30, i, 80, i); } Allows the program to make a decision about which code to execute. If the expression evaluates to true, the statements enclosed within the block are executed and if the expression evaluates to false the statements are not executed. if(expression) { statements } expression any valid expression that evaluates to true or false statements one or more statements to be executed else 1.0 Structure PDE