if executes statement even if variable values arent equal?

Question

var x = 5
var y = 10
if(x=y){
alert("X is equal to Y")
}

even if variables X and Y aren't equal, the alert pops up. why is this the case? I know about the "==" and "===" sign and the alert doesn't execute when using this but how come with the "="? I just want to know why

Answer 1

Maybe it's because the type coercion. It only compares the types of x and y => both of them numbers so it's true. You should change it to "===" which means identical.

Answer 2

// Assign y value to x.
x = y
// x === 10: true.

You used assignment. This is neither abstract comparision == nor strict comparision ===. The statement is executed if the condition is truthy. x is now 10, and any number except 0 is truthy. Thus alert is called.

Answer 3

D⚽⚽⚽⚽7⃣7⃣7⃣ both == and === compare the type and value of 2 operands, but == tries to find the 'closest' type to match the operand while === doesn't.