JavaScript Loops:

  1. for 
    <script type="text/javascript">    
    // for loop

    const cities = ['Delhi', 'Bangalore', 'Pune', 'Patna', 'Mysore', 'Mumbai', 'Jaipur', 'Bhopal'];

    for (var i = 0; i < cities.length; i++) {
        console.log(cities[i]);
    }
</script>
    Output:

     
  2. while 
    <script type="text/javascript">    
    // while loop

    const cities = ['Delhi', 'Bangalore', 'Pune', 'Patna', 'Mysore', 'Mumbai', 'Jaipur', 'Bhopal'];

    let i = 0;

    while(i < cities.length){
        console.log(cities[i]);
        i++;
    }
</script>
    Output:

     
  3. foreach 
    <script type="text/javascript">    
    // foreach loop

    const cities = ['Delhi', 'Bangalore', 'Pune', 'Patna', 'Mysore', 'Mumbai', 'Jaipur', 'Bhopal'];

    cities.forEach(value => {
        console.log(value);
    });    
</script>
    Output:

     
  4. map 
    <script type="text/javascript">    
    // map loop

    const cities = ['Delhi', 'Bangalore', 'Pune', 'Patna', 'Mysore', 'Mumbai', 'Jaipur', 'Bhopal'];

    const cityNames = cities.map(value => {
        const cityName = value.toUpperCase();
        return cityName;
    });

    console.log(cityNames);
</script>
    Output:

     
  5. do while 
    <script type="text/javascript">    
    // do while loop

    const cities = ['Delhi', 'Bangalore', 'Pune', 'Patna', 'Mysore', 'Mumbai', 'Jaipur', 'Bhopal'];

    let i = 0;

    do {
        console.log(cities[i]);
        i++;
    }
    while(i < cities.length)
</script>
    Output:

     
  6. for in 
    <script type="text/javascript">    
    // for in loop

    const cities = ['Delhi', 'Bangalore', 'Pune', 'Patna', 'Mysore', 'Mumbai', 'Jaipur', 'Bhopal'];

    for(const key in cities) {
        console.log(cities[key]);
    }
</script>
    Output:

     
  7. for of 
    <script type="text/javascript">    
    // for of loop

    const cities = ['Delhi', 'Bangalore', 'Pune', 'Patna', 'Mysore', 'Mumbai', 'Jaipur', 'Bhopal'];

    for(const value of cities) {
        console.log(value);
    }
</script>

    Output: