JavaScript Subtraction Assignment

LeftOperand -= RightOperand;

// Standard numeric operation
let a = 10;
a -= 3; 
// Result: 7

// String coercion: Valid numeric strings are converted to Numbers
let b = 15;
b -= "5"; 
// Result: 10

// String coercion: Non-numeric strings evaluate to NaN
let c = 20;
c -= "text"; 
// Result: NaN (Any further math with c will also be NaN)

// Boolean coercion: true becomes 1, false becomes 0
let d = 5;
d -= true; 
// Result: 4

// Null and Undefined coercion
let e = 10;
e -= null; 
// Result: 10 (null coerces to 0)

let f = 10;
f -= undefined; 
// Result: NaN (undefined coerces to NaN)

let g = 20n;
g -= 5n; 
// Result: 15n

let h = 20n;
h -= 5; 
// Throws TypeError: Cannot mix BigInt and other types, use explicit conversions