JavaScript-Summary/Challenges/2- Operators Challenge/main.js at master · Ahmed-Adel-Morsi/JavaScript-Summary · GitHub

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/*
  Challenge 1
*/

let a = 10;
let b = "20";
let c = 80;

console.log(++a + +b++ + +c++ - +a++);
/*
  [++a] [+] [+b++] [+] [+c++] [-] [+a++]
  [++a]
  - Value: 11
  - Explain: pre increment
  [+]
  - Explain: Addion Operator
  [+b++]
  - Value: 20
  - Explain: unary plus and post increment Operator
  [+]
  - Explain: Addion Operator
  [+c++]
  - Value: 80
  - Explain: unary plus and post increment Operator
  [-]
  - Explain: Subtraction Operator
  [+a++]
  - Value: 11
  - Explain: unary plus and post increment Operator

  Total = 100
  a = 12
  b = 21
  c = 81
*/

console.log(++a + -b + +c++ - -a++ + +a);
/*
  [++a] [+] [-b] [+] [+c++] [-] [-a++] [+] [+a]
    13   +   -21  +    81    -   -13    +   14
  [++a]
  - Value: 13
  - Explain: pre increment
  [+]
  - Explain: Addion Operator
  [-b]
  - Value: -21
  - Explain: unary negation
  [+]
  - Explain: Addion Operator
  [+c++]
  - Value: 81
  - Explain: unary plus and post increment Operator
  [-]
  - Explain: Subtraction Operator
  [-a++]
  - Value: -13
  - Explain: unary negation and post increment Operator
  [+]
  - Explain: Addion Operator
  [+a]
  - Value: 14
  - Explain: unary plus

  Total = 100
  a = 14
  b = 21
  c = 82
*/

console.log(--c + +b + --a * +b++ - +b * a + --a - +true);
/*
  [--c] [+] [+b] [+] [--a] [*] [+b++] [-] [+b] [*] [a] [+] [--a] [-] [+true]
  [--c]
  - Value: 81
  - Explain: pre Decrement
  [+]
  - Explain: Addion Operator
  [+b]
  - Value: 21
  - Explain: unary plus
  [+]
  - Explain: Addion Operator
  [--a]
  - Value: 13
  - Explain: pre Decrement
  [*]
  - Explain: Multiplication Operator
  [+b++]
  - Value: 21
  - Explain: unary plus and post increment Operator
  [-]
  - Explain: Subtraction Operator
  [+b]
  - Value: 22
  - Explain: unary plus
  [*]
  - Explain: Multiplication Operator
  [a]
  - Value: 13
  [+]
  - Explain: Addion Operator
  [--a]
  - Value: 12
  - Explain: pre Decrement
  [-]
  - Explain: Subtraction Operator
  [+true]
  - Value: 1
  - Explain: unary plus

  Total = 100
  a = 12
  b = 22
  c = 81
*/

/*
  Challenge 2
*/

let d = "-100";
let e = "20";
let f = 30;
let g = true;

// Only Use Variables Value
// Do Not Use Variable Twice

console.log(-d * +e); // 2000
console.log(-d + ++f + ++e * ++g); // 173