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14_Operator precedence.js

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+let x = 2 + 3 * 4 // Multiply has precedence over addition.
+console.log('x is', x);
+
+let y = ( 2 + 3 ) * 4 // Values within the brackets are executed first.
+console.log('y is', y);

15_Swapping exercise.js

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+//Swapping exercise
+
+let a = 'red';
+let b = 'blue';
+
+let x = a; // copying the value of a into an empty variable x.
+
+a = b; // overwriting the value of a, by copying the value of b into a.
+
+b = x; // overwriting the value of b, by copying the value of x into b.
+
+
+
+console.log(a);
+console.log(b);

16_If_Else_ statments.js

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+let hour = 20;
+if ( hour >= 6 && hour < 12 ){
+    console.log("Good Morning");
+}
+else if( hour >=12 && hour < 18){
+    console.log('Good afternoon');
+}
+else
+console.log('Good evening');

17_Switch_case.js

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+let role = 'Unknown';
+
+switch(role){
+    case 'guest':
+        console.log('Guest user');
+        break;
+
+    case 'moderator':
+        console.log('Moderator User');
+        break;
+
+    default:
+        console.log('Unknown User');
+
+    }

18_For_Loop.js

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+//Print numbers 0 to 4 .
+for ( let i = 0; i < 5; i++){
+    console.log('Hello World', i);
+}
+
+//Print numbers 1 to 5.
+for ( let j = 1; j <= 5; j++){
+    console.log('Hello World', j);
+}
+
+
+
+//Display odd numbers b/w 1 to 5.
+console.log("Odd nos are:");
+for (let n = 1; n <= 5; n++){
+        if ( n % 2 !== 0) console.log(n);
+}
+
+//Display odd numbers b/w 1 to 5 in reverse order.
+console.log("Odd nos in reverse order are:");
+for( let m = 5; m >= 1; m--){
+    if ( m % 2 !== 0) console.log(m);
+}

19_While_Loop.js

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+// For loop printing first 5 odd numbers.
+for (let i=0; i<=5; i++){
+    if (i%2 !== 0) console.log(i);
+}
+
+// While loop printing first 5 odd numbers.
+let i = 0; // external declaration of variable.
+while (i <= 5){
+    if ( i%2 !== 0) console.log(i);
+    i++;
+}

20_Do_While_Loop.js

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+// For loop printing first 5 odd numbers.
+// for (let i=0; i<=5; i++){
+//     if (i%2 !== 0) console.log(i);
+// }
+
+// While loop printing first 5 odd numbers.
+// let i = 0;
+// while (i <= 5){
+//     if ( i%2 !== 0) console.log(i);
+//     i++;
+// }
+
+//Do-While loop
+
+let j = 11;
+do{ if (j % 2 !== 0 ) console.log(j);
+    j++;
+} while( j <=5 );

21_For_In_Loop.js

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+//for-in loop
+
+//Declaring an object named Person
+const person = {
+    name: 'ash', //key:value
+    age: 30
+};
+
+for( let key in person)
+console.log(key, person[key]);
+
+
+const colors = ['red', 'green', 'blue'];
+for( let index in colors) 
+console.log(index, colors[index]);

22_For_Of_Loop.js

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+//For-Of loop displays only elements of an array.
+
+const colors = ['red','green','blue'];
+for(let color of colors){
+    console.log(color);
+};

23_Break_Continue_Statements.js

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+//Break and continue statements for loops.
+
+let i=0;
+while(i<=10){
+    // if(i===5) break;
+
+    if(i%2===0){
+        i++;
+        continue; // execution goes back to the starting of the loop.
+    }
+
+    console.log(i);
+    i++;
+}
+

24_Exercise_Functions_Max_number.js

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+//Find max number
+
+// function max (n1, n2){
+
+// if( n1 > n2)
+// console.log("Maximum no. is", n1);
+
+// else if( n2 > n1)
+// console.log("Maximum no. is", n2);
+
+// else
+// console.log('Both numbers are equal');
+// };
+
+// max(20,2);
+
+
+
+// function max1(n1,n2){
+//     if ( n1 > n2) return n1;
+//     else // don't really need this.
+//     return n2;
+
+// };
+
+
+// console.log(max1(5,13));
+
+
+
+function max2(a,b){
+    return a > b ? a : b; 
+};
+
+console.log(max2(16,6));

25_Exercise_Functions_Landscape_Portrate.js

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+// function isLandscape(width, height){
+//     return width > height ? 'Yes' : 'No'; 
+
+// };
+
+// console.log(isLandscape(1600, 800));
+
+
+
+function isLandscape(width, height){
+    return console.log((width > height)); // no need to pass yes or no, the expression returns true or false on its own.
+
+};
+
+isLandscape(1200, 800);

26_Exercise_If_Else_FizzBuzz.js

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+//Divisible by 3 => Fizz
+//Divisible by 5 => Buzz
+//Divisible by both 3 and 5 => FizzBuzz
+//Not Divisible by 3 or 7 => same input
+//Not a number = 'Not a number'
+
+
+// function fizzBuzz(input){
+//     if ( typeof input !== 'number') // gives type of value
+//     return NaN; //Not a number
+
+//     else if (( input % 3 === 0 ) &&  (input % 5 === 0 ))
+//     return 'FizzBuzz';
+
+//     else if ( input % 3 === 0 )
+//     return 'Fizz';
+
+//     else if  (input % 5 === 0 )
+//     return 'Buzz';
+
+//     else
+//     return input;
+
+// };
+// console.log(fizzBuzz(15));
+
+//We can also remove the else part to make it cleaner.
+
+function fizzBuzz(input){
+    if ( typeof input !== 'number') // gives type of value
+    return NaN; //Not a number
+
+    if (( input % 3 === 0 ) &&  (input % 5 === 0 ))
+    return 'FizzBuzz';
+
+    if ( input % 3 === 0 )
+    return 'Fizz';
+
+    if  (input % 5 === 0 )
+    return 'Buzz';
+
+    return input; //no need of if statment as this is the only option left.
+
+};
+console.log(fizzBuzz(15));

27_Exercise_Nested_If_Else_Demerit_Points.js

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+/* 
+speed limit is 70
+5 => 1 point
+Math.floor(1.3)
+12 points => suspended
+ */
+
+
+function checkSpeed(speed){
+    const speedLimit = 70;
+    const kmPerPoint = 5;
+
+    if(speed < speedLimit + kmPerPoint) 
+    return console.log('Ok');
+
+    const points = Math.floor((speed - speedLimit)/ kmPerPoint);
+
+
+    if (points > 12) 
+    console.log('License Suspended!');
+    else
+     console.log('Point are:', points); 
+}
+
+checkSpeed(135);
+
+
+
+// function checkSpeed(speed){
+//     const speedLimit = 70;
+//     const kmPerPoint = 5;
+
+//     if (speed < speedLimit + kmPerPoint){
+//         console.log('Ok');
+//         return; // this stops the execution here and code after this if block doesn't get executed.
+//         // Helps us to remove the indentation.
+//     }
+
+//     const points = Math.floor((speed - speedLimit) / kmPerPoint );
+
+//     if (points > 12)
+//     console.log('License suspended');
+//     else
+//     console.log('Points are:', points);
+
+//     }
+// checkSpeed(75);

28_Exercise_For_Loop_Odd_Even.js

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+function showNumbers(limit){
+    for(i=0; i<=limit;i++){
+        // if(i%2 === 0) console.log(i,"Even");
+        // else console.log(i,'Odd');
+
+        const message = (i%2 ===0) ? 'Even' : 'Odd';
+        console.log(i,message);
+    };
+
+};
+
+showNumbers(10);

29_Exercise_Array.js

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+function countTruthy(numbers){
+    counter=0;
+    for( let index of numbers){
+        if(index)
+        counter++;
+    }
+    return console.log(counter);
+}
+
+
+
+const numbers = [0,1,2,3,4,'five', 6, null, NaN,undefined,false]
+
+countTruthy(numbers);
+
+
+

30_Exercise_Objects_String.js

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+const movie = {
+    title: 'a',
+    releaseYear: 2018,
+    rating: 4.5,
+    director: 'b'
+};
+
+function showProperties(obj){
+
+    for( let key in obj){
+
+    if (typeof obj[key] === 'string')
+      console.log(key,obj[key]);
+
+    }
+
+
+}
+
+showProperties(movie);

31_Exercise_Sum of Multiples 3 and 5.js

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+//multiple of 3: 3,6,9,12
+//multiple of 5: 5,10
+
+
+
+// function sum(limit){
+//  let sum = 0;
+
+//  for(let i=0; i<= limit;i++)
+//   if (i % 3 === 0 || i % 5 === 0)
+//   sum += i;
+
+
+// return sum;
+
+// }
+
+// console.log(sum(12));
+
+
+
+function sum(limit){
+  let total= 0;
+  for(let i=0; i<= limit; i++){
+      if(i % 3 === 0 || i % 5 === 0)
+      total += i;
+  }
+return console.log(total);
+
+}
+
+sum(10);