/Swift/Left side of mutating operator isn't mutable: 'self' is immutable

Left side of mutating operator isn't mutable: 'self' is immutable

   mutating func nextQuestion(){ // add "mutating" before func to change value of variables from (the struct)
        if questionNumber + 1 < questions.count { // to count answered questions
            questionNumber += 1
        }else{
            questionNumber = 0
        }
    }

Similar codes

0 vote148 views1 answer
Swift loop site:stackoverflow.com
Swift
0 vote143 views1 answer
Log HTTPURLRESPONSE swift
Swift
1 vote149 views2 answers
How to dismiss keyboard in swift
Swift
2 votes142 views1 answer
Swift + data to string
Swift
2 votes153 views1 answer
Swiftui button transparent background
Swift
0 vote121 views1 answer
Jsonserialization swift
Swift
-1 vote102 views1 answer
Get index from array swift
Swift
-1 vote144 views2 answers
Transform string to url swift
Swift
0 vote157 views1 answer
Uibutton swift set title
Swift
0 vote145 views1 answer
Swift from 1 to 01
Swift