Day 1: Functions Solution

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Day 1: Functions Solution

Objective

Today, weโre discussing JavaScript functions. Check out the attached tutorial for more details.ย ย

Implement a function namedย factorialย that has one parameter: an integer,ย n. It must return the value ofย n!ย (i.e.,ย nย factorial).

Input Format

Locked stub code in the editor reads a single integer,ย n, from stdin and passes it to a function namedย factorial.

Constraints

• 1 <=ย nย <= 10

Output Format

The function must return the value ofย n!.

`4`

`24`

Explanation 0

We return the value ofย ย 4! = 4 x 3 x 2 x 1 = 24.

Solution โ Day 1: Functions

```'useย strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

letย inputStringย =ย '';
letย currentLineย =ย 0;

process.stdin.on('data',ย inputStdinย =>ย {
ย ย ย ย inputStringย +=ย inputStdin;
});

process.stdin.on('end',ย _ย =>ย {
ย ย ย ย inputStringย =ย inputString.trim().split('\n').map(stringย =>ย {
ย ย ย ย ย ย ย ย returnย string.trim();
ย ย ย ย });
ย ย ย ย
ย ย ย ย main();ย ย ย ย
});

ย ย ย ย returnย inputString[currentLine++];
}
/*
ย *ย Createย theย functionย factorialย here
ย */
functionย factorial(n)ย {
ย ย ย ย ifย (nย <ย 2){
ย ย ย ย ย ย ย ย returnย 1;
ย ย ย ย }
ย ย ย ย returnย nย *ย factorial(n-1);
}

functionย main()ย {
ย ย ย ย constย nย =ย +(readLine());
ย ย ย ย
ย ย ย ย console.log(factorial(n));
}

```

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