perl的if else判断
perl的if及else判断,纯笔记.
- #!/usr/bin/perl
- $a=1;
- $b=2;
- if($b>$a){
- print '$b gt $a'."\n"
- }else{
- print '$b is not gt $a'."\n"
- }
任何标量都可以是if控制结构里的判断条件!
- #!/usr/bin/perl
- $a=1;
- $b=2;
- $RE=$b gt $a;
- if($RE){
- print "ture\n"
- }else{
- print "failed\n"
- }
如果$b大于$a,$RE为真值,输出true. 不else也可以继续if
- #!/usr/bin/perl
- $a=2;
- $b=2;
- $RE=$b gt $a;
- if($RE){
- print "ture\n"
- }
- #}else{
- # print "failed\n"
- #}
- if(!$RE){
- print "failed\n"
- }