22
33// Predict the output of the following code:
44// =============> Write your prediction here
5-
5+ // Since getLastDigit() does not declare any parameters, the arguments passed when calling it are going to be ignored
66const num = 103 ;
77
88function getLastDigit ( ) {
@@ -15,10 +15,25 @@ console.log(`The last digit of 806 is ${getLastDigit(806)}`);
1515
1616// Now run the code and compare the output to your prediction
1717// =============> write the output here
18+ // The last digit of 42 is 3
19+ // The last digit of 105 is 3
20+ // The last digit of 806 is 3
1821// Explain why the output is the way it is
1922// =============> write your explanation here
23+ // The function getLastDigit() does not have any parameters, but it is being called with arguments:
24+ // getLastDigit(42), getLastDigit(105), and getLastDigit(806). Inside the function, it always uses the global const num, which is set to 103.
25+ // The means every call ignores the last digit of 103. Which the '3'
26+
27+
2028// Finally, correct the code to fix the problem
2129// =============> write your new code here
30+ function getLastDigit ( num ) {
31+ return num . toString ( ) . slice ( - 1 ) ;
32+ }
33+
34+ console . log ( `The last digit of 42 is ${ getLastDigit ( 42 ) } ` ) ;
35+ console . log ( `The last digit of 105 is ${ getLastDigit ( 105 ) } ` ) ;
36+ console . log ( `The last digit of 806 is ${ getLastDigit ( 806 ) } ` ) ;
2237
2338// This program should tell the user the last digit of each number.
2439// Explain why getLastDigit is not working properly - correct the problem
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