what does ternary mean code example

Example 1: ternary operator

// (condition) ? (if true, do this) : (otherwise, do this)
const hasAccount = true
// let userDisplayMessage
// if (hasAccount) {
//   userDisplayMessage = 'Welcome Back'
// } else {
//   userDisplayMessage = 'Please Sign Up'
// }
const userDisplayMessage = hasAccount ? 'Welcome Back' : 'Please Sign Up'
console.log(userDisplayMessage)

Example 2: ternary operator

isMember ? '$2.00' : '$10.00'
// isMember true =>  output: "$2.00"

// isMember false =>  output: "$10.00"

// isMember null =>  output: "$10.00"