How to check if the value exists in array?

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Wed Feb 08 2023 19:38:54 GMT+0000 (Coordinated Universal Time)

const army=["Marcos", "DeltaForce", "Seals", "SWAT", "HeadHunters"];  

if(army.indexOf("DeltaForce") !== -1) {
  console.log("exist")
} else {
  console.log("not exist")
}

if(army.includes("DeltaForce")) {
  console.log("exist")
} else {
  console.log("not exist")
}

for(let i = 0; i < army.length; i++) {
  if(army[i] === "DeltaForce") {
    console.log("exist")
    break
  }
}

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Data Structure and Algothrim

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How to check if the value exists in array?

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