Question

6. Store your important phone numbers in a hash. Write a program to look up umbers by the person’s name in perl language.

Answer 1

To write code for important phone number in Hash and look up numbers by the person's name in perl language;

Before implementing this code we have to write some explaination of this code;

Initialization of hash & fetching an element to the hash: -

A hash variable can be initialized with key/value pair during it's declaration time . There are two ways for initialize the hash variable one is using => which is called the fat arrow or fat comma .

And the second one is to put the key/value pair in double quote(" ") & separated by comma(,) .

To access the individual element from hash use the symbol ($).

These are the things we are going to used in our code:

#perl program to demonstrate the

#Fetching an element of a hash with Mobile number.

#creating hash

%rateof = (" Amol "=> 9834562730 , " john " => 9934562738, " krish " => 9735261781 );

#fetching an element of hash

print  "$rateof { 'Amol'}\n" ;

print "$rateof {'john'}\n;

print "$rateof {'krish'}\n" ;

output:

9834562730

9934562738

9735261781