![One-dimensional arrays
• An array is a special variable, which can hold more than one value at a time
int[] a = new int[6];
a[0] = 12;
a[1] = 2;
a[2] = 1;
a[3] = 232;
a[4] = 16;
a[5] = 99;
Console.WriteLine(a[5]);//prints '99'](https://image.slidesharecdn.com/lesson2-160325102214/85/Lesson2-3-320.jpg)
Lesson2
- 1. Lesson 2 Learn C#. Series of C# lessons http://csharp.honcharuk.me/lesson-2
- 2. Agenda • Arrays • Conditional statements: if, if-else, switch • Loops: for, foreach, while and do…while
- 3. One-dimensional arrays • An array is a special variable, which can hold more than one value at a time int[] a = new int[6]; a[0] = 12; a[1] = 2; a[2] = 1; a[3] = 232; a[4] = 16; a[5] = 99; Console.WriteLine(a[5]);//prints '99'
- 4. if and if-else statements Condition Previous calculations Some calculations Some calculations True False Other program calculations Condition Previous calculations Some calculations True Other programs calculations ifIf-else
- 5. switch statement expression code block 1 code block 2 code block 3 code block N case 1 case 1 case 1 default Console.WriteLine("Enter girl's name:"); string girlName = Console.ReadLine(); switch (girlName) { case "Kate": Console.WriteLine("Just ignore her."); break; case "Samanta": Console.WriteLine("Give her your phone number!"); break; case "Melissa": Console.WriteLine("She has a birthday pretty soon!"); break; default: Console.WriteLine("Sorry, I don't know {0}", girlName); break; } Console.WriteLine("Enter girl's name:"); string girlName = Console.ReadLine(); if (girlName == "Kate") { Console.WriteLine("Just ignore her."); } else if (girlName == "Samanta") { Console.WriteLine("Give her your phone number!"); } else if (girlName == "Melissa") { Console.WriteLine("She has a birthday pretty soon!"); } else { Console.WriteLine("Sorry, I don't know {0}", girlName); }
- 6. Loop operators: while, do-while Condition Previous calculations body True False Other calculations Condition Previous calculations body True False Other calculations int moneyInWallet = 100; int iPhonePrice = 499; while (moneyInWallet < iPhonePrice) { //keep on making money moneyInWallet = moneyInWallet + 1; } while int moneyInWallet = 0; int iPhonePrice = 499; do { //keep on making money moneyInWallet++; //increment } while (moneyInWallet > iPhonePrice); do-while
- 7. Loop operators: for Condition initialization body True False Counter change Other calculations for (int index = 1; index < 10; index++) {//Body Console.WriteLine("Number {0}", index); }
- 8. if and for demo for condition initialization True False Counter change Other calculations If condition Some actions True False for (int index = 0; index <= 10; index++) { if (index%2 == 0) { Console.WriteLine($"Number {index} in an even number"); } }
- 9. Loops operators • break • continue
Editor's Notes
- #4: http://www.functionx.com/csharp3/Lesson21.htm