JavaScript Struggles — Part 3 | String Auto Converting

One of the weirdest things that JvaScript do is convert string variable to numbers by itself.

When does it convert a string to a number?

We have 4 operators that can turn the string into a number when the string value is numbers:

• Plus (+)
• Minus (-)
• Multiply (*)
• Divide (/)

Plus (+)

In JavaScript, the plus operator has two cases.

1- When you use the + with a string that only have numbers it'll be converted automatically to number.

console.log('1'+'2'); // Outputs: 3

2- When you use the + with a string that contains text, it'll not be converted to numbers; it'll be added to the text.

console.log("Hey"+"There"); // Outputs: HeyThere

Minus (-)

Whenever we use — in our code the string automatically gets converted to a number.

E.g.

console.log('5' - 1); // Outputs: 4
console.log('5' - '2'); // Outputs: 3

Multiply (*)

Whenever we use * in our code the string automatically gets converted to a number.

console.log('5' * 3); // Outputs: 15
console.log('5' * '2'); // Outputs: 10

Divide (/)

Whenever we use / in our code the string automatically gets converted to a number.

console.log('6' / 2); // Outputs: 3
console.log('9' / '3'); // Outputs: 3

Thanks for reading! 😁