#stringという変数に"This is my pen"を代入する。$string = "This is my pen";print $string, "\n"; ---- #文字の連結$string = "This is " . "my pen";#結合後スペースは入らないので注意。 ---- #四則演算$price = 2000;print $price + 1000; print $price - 1000; print $price * 0.9; print $price / 2; ---- #int関数print int(10/3):→3 ---- #余剰の計算print int(10/3):→1 ---- #累乗print (3**2);→9 print (-3**2); →-9 ---- #++と--$number = 10;$number++; →number = 11 #++は1増加,--は1減少 |
#切り取り$string = "This is my pen";
$part = substr($string, 0, 7); print $part, "\n"; →This is #-3から3文字得る $part = substr($string, -3, 3); print $part, "\n"; →pen #置換$part = substr($string, -6, 2 'our');print $part, "\n"; → This is our pen |
#検索$string = "This is my pen";print index($string, 'my') , "\n"; → 8(の位置にある) print index($string, 'our') , "\n"; → -1(存在しない) print index($string, 'i') , "\n"; → 2 print rindex($string, 'i') , "\n"; → 5 |
#文字列置換$string = "This is my pen";$string =~ s/my/our/; print $string, "\n"; → This is our pen |