ios - Counter property does not change value -

i making quiz in swift playgrounds app , want keep counter of number of correct answers. value of correct doesn't change, , don't know why.

  var correct:int = 0     func qa(question: string, answer: string) {     show(question)     var ans = ask("answer")     if (ans.lowercased() == answer) {         show("correct")         correct = correct + 1     } else {         show("wrong numpty!")     } }      func qaor(question: string, answer: string, answer2: string) {     show(question)     var ans = ask("answer")     if (ans.lowercased() == answer) || (ans.lowercased() == answer2) {         show("correct")         correct = correct + 1     } else {         show("wrong numpty!")     } }   show("what name?")  let name = ask("name")  show("hi " + name)  qa(question: "what name of character played simon jones in hitchikers guide galaxy?", answer: "arthur dent")  qaor(question: "what voiced peter jones in hitchikers guide galaxy?", answer: "the book", answer2: "the guide")  qa(question: "finish sentence  .doing coastlines favourite, rough crinkley edges, .... ", answer: "fjords")  var cf = "no" if (correct == 0) {     var cf = "no" } else if (correct == 1) {     var cf = "one" } else if (correct == 2) {     var cf = "two" } else if (correct == 3) {     var cf = "three" }  show("you got " + cf + " questions correct out of three") 

do not declare cf variable every if/else statement. creates local variable , aren't changing first cf.

instead, try this:

var cf = "no" if (correct == 0) {     cf = "no" } else if (correct == 1) {     cf = "one" } else if (correct == 2) {     cf = "two" } else if (correct == 3) {     cf = "three"  }  show("you got " + cf + " questions correct out of three")