Start learning Perl scripts,record some useful Perl functions here.
- Int()
Function int() can return a integer from a float value.
[user@host perl]$ perl -e "print int(1.6)"
1[user@host perl]$ perl -e "print int(2.6)"
2[user@host perl]$
- Rand()
Function rand() can return a radon value between 0 and a certain integer.
[user@host perl]$ perl -e "print int(rand(20))"
5[user@host perl]$
perl -e "print int(rand(20))"
7[user@host perl]$ perl -e "print int(rand(20))"
15[user@host perl]$
perl -e "print int(rand(20))"
7[user@host perl]$
- Chr()
Function chr() can return a character of keyboard from a number.
[user@host perl]$
perl -e "print chr(48)"
0[user@host perl]$
perl -e "print chr(43)"
+ [user@host perl]$
perl -e "print chr(37)"
%[user@host perl]$
These are simple functions,I’ll collect more in future. I always remember the sentence “Thousands of miles are beginning form our feet!”
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