what is expression in javascript code example

Example 1: javascript function expression

const mul = function(x, y){
    return x * y;
}; //semicolon needs to be there as it is expression

console.log(mul(10, 20));

Example 2: javascript expression

// EXPRESSION: Code that produces a value
// example(s):
3 + 4
1991
true && false && false

// STATEMENT: Code that performs actions (generally something that ends in ";"
// example:
const str = `String assigned to str`;