function expression javascript

1const plantNeedsWater = function(day){
2  if (day === 'Wednesday'){
3    return true;
4  } else{
5    return false;
6  }
7}
8
9console.log(plantNeedsWater('Tuesday'))

1const getRectArea = function(width, height) {
2  return width * height;
3};
4
5console.log(getRectArea(3, 4));
6// expected output: 12
7

1const mul = function(x, y){
2    return x * y;
3}; //semicolon needs to be there as it is expression
4
5console.log(mul(10, 20));

1// EXPRESSION: Code that produces a value
2// example(s):
33 + 4
41991
5true && false && false
6
7// STATEMENT: Code that performs actions (generally something that ends in ";"
8// example:
9const str = `String assigned to str`;