Branch Dart Decision making determine program flow under certain conditions - IF Requires a bool value (from a logical or comparison operator), and executes part of the process if the value of the bool is "true". Written with: if (value_bool) { //process if bool_value is true } Example : void main() { var age = 17; if (age < 20 ){ print ('Teeneger'); } } If the age is less than 20, the output will show teenagers on the screen. - IF-ELSE goes with "if", and adds an alternative if the bool value is "false" written with: if (bool_value) { // process if bool_value is "true" } else { // process if bool_value is "false" } Example : void main() { var age = 21; if (age < 20) { print('Teeneger'); } else { print('has no class'); } } If the using is less than 20, a teenager will be displayed on the screen. otherwise, “has no class” will be displayed on the screen. - ELSE-IF Goes with "if", adds an alternative if the bool value is "false" and adds another bool value test. written with: if (bool_value) { // process if bool_value is "true" } else if (value_bool1) { // process if_bool value is "false" // and value_bool1 is "true" } Example: void main() { var age = 21; if (age < 20) { print('Teeneger'); } else if (age < 50) { print('Adult'); } else { print('has no class'); } } If the using is less than 20, a teenager will be displayed on the screen. If the age is less than 50, then "Adult" is displayed on the screen. Otherwise, “has no class” will be displayed on the screen.