Achele/operators-control-flow

A JavaScript practice questions and answer

operators-control-flow

A JavaScript practice questions and answer

Task 1: List the symbols for each of the below JavaScript operators

• Arithmetic Operators - The symbols are:

  • +,
  • *,
  • /
  • -,
  • %

• Assignment Operators - used to assign values to variables. The symbols are:

  • =
  • +=
  • -=
  • *=
  • /=
  • %=

• Comparison Operators

  • ==,
  • ===,
  • !=,
  • !==,
  • <,

  • =

  • <=,
  • ?

• Logical Operators

  • &&
  • ||
  • !

• Bitwise Operators -

Task 2: For each JavaScript Operator, write 2 examples.

• Arithmetic Operators

  • Example 1: let add = num1 + num2; // This adds the value assigned to num1 and num2, and assign the result to the variable add.

  • Example 2: let y += 2 // This adds 2 to the value assigned to y and assigns the result to y. i.e y = y + 2

• Assignment Operators

  • Example 1: let name = "Ojoachele" //This assigns the string Ojoachele to the variable name

  • Example 2: let age = 10 //This assigns the number 10 to the variable age

• Comparison Operators

  • Example 1:

      let x = 5;
      let y = 10;
      
      let lessThan = x < y ? `${x} is less than ${y}` : `${x} is greater than ${y}`;
      console.log(lessThan);
  

  This returns 5 is less than 10.

  • Example 2:

  let age = 18
  
  let votable = (age < 18)? "Too young, can't vote" : "Old enough, eligible to vote"
  console.log(votable)
  
  

  This returns Old enough, eligible to vote because the age is 18

  • Logical Operators

    • Example 1:

    let x = 10
    let y = 6
    
    console.log(x < 20 && y > 1);
    

    This evaluates to true because 10 is less than 20 and 6 is greater than 1

    • Example 2:

    let x = 20
    let y = 20
    
    console.log(!(x==y))
    

    This returns false because x is equal to y

Task 4: What is the result when the following program is executed?

for(let i = 0; i < 20; i +=7){
console.log(i)
}

The result is

• 1
• 8
• 15