This is my code in TypeScript:

const num1 = 10;
const num2 = 20;


if(num1===num2){
    console.log("true")
}

This is giving me error: enter image description here

Error: This comparison appears to be unintentional because the types ’10’ and ’20’ have no overlap.

If i am assigning number to these variables like this:

const num1:number = 10;
const num2:number = 20;

then this is running fine, I am learning typescript, so kindly explain me why is the first code without giving types to variables is giving me error?

Also, if i am declaring variables with let , its running fine.