The '+' operator is overloaded: it is used for string concatenation and

arithmetic addition. This may cause problems when inadvertently mixing

strings and numbers. As a unary operator, it can convert a numeric

string to a number.

// Concatenate 2 strings

console.log('He' + 'llo'); // displays Hello

// Add two numbers

console.log(2 + 6); // displays 8

right)

console.log(2 + '2'); // displays 22

console.log('$' + (3 + 4)); // displays $7

string is added

// Convert a string to a number using the unary plus

console.log(+'2' === 2); // displays true

console.log(+'Hello'); // displays NaN

Similarly, the '*' operator is overloaded: it can convert a string into

a number.

console.log(2 + '6'*1); // displays 8

console.log(3*'7'); // 21

console.log('3'*'7'); // 21

console.log('hello'*'world'); // displays NaN

JavaScript supports the following binary arithmetic operators:

| + | addition |

|---|---|

| - | subtraction |

| * | multiplication |

| / | division (returns a floating-point valu… |

| % | modulo (returns the remainder) |

| ** | exponentiation |

JavaScript supports the following unary arithmetic operators:

| + | unary conversion of string to number |

|---|---|

| - | unary negation (reverses the sign) |

| ++ | increment (can be prefix or postfix) |

| -- | decrement (can be prefix or postfix) |

let x = 1;

console.log(++x); // x becomes 2; displays 2

console.log(x++); // displays 2; x becomes 3

console.log(x); // x is 3; displays 3

console.log(x--); // displays 3; x becomes 2

console.log(x); // displays 2; x is 2

console.log(--x); // x becomes 1; displays 1

The modulo operator displays the remainder after division by the

modulus. If negative numbers are involved, the returned value depends on

the operand.

const x = 17;

console.log(x%5); // displays 2