JavaScript Unary Operators: Converting Booleans with '+' and Strings with '!'. Asked in 2nd round Capgemini. Javascript interview question.

Let's break down Javascript concepts:

1. Evaluating console.log(+true);

• Unary Plus Operator (+): This operator attempts to convert its operand into a number. ​
• Operand: true: In JavaScript, the boolean value true is converted to the number 1 when using the unary plus operator.
  
  NOTE : true → 1 & false → 0.

• Evaluation:

• +true → 1

• Output:
• The console.log function prints 1 to the console.​

2. Evaluating console.log(!"ValueAdda");

• Logical NOT Operator (!): This operator inverts the boolean value of its operand. If the operand is truthy, ! converts it to false; if falsy, to true. ​
  
• Operand: "ValueAdda": In JavaScript, non-empty strings are considered truthy values.​
  
  NOTE : falsy values in javascript are "", 0, false, null, undefined, NaN, and 0n. Here NaN means not a number and it's type if number and 0n mean representation of 0 in BigInt number.

• Evaluation:
• !"ValueAdda" → false

• Output:
• The console.log function prints false to the console.​

Summary of Outputs:

• The first console.log outputs 1.​
• The second console.log outputs false.​

Understanding these operators and their behavior with different data types is crucial for effective JavaScript programming.

Answer is :  A) 1 false