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I am trying to explain why the chat function does not work for me to try to take input from the user Has been: 

  My $ string = & lt; STDIN & gt; My $ chr = peak ($ ​​string); Print "string: $ string \ n"; Print "Four: $ chr \ n";   
 output  
  perl chop.pl Hello string: Hello four:   
 But if I use a string I do it, so it works!  
  My $ string = "frong"; My $ chr = peak ($ ​​string); Print "string: $ string \ n"; Print "Four: $ chr \ n";   
 output [583]  
  perl chop.pl string: fron char: g    
 
 
 When you pass the input from the console, cutting  chop  to  newline  At the end is the string, which exists when you press  Enter  while your string does not have this.

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