Show Example 1

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2023-12-01

假设变量$ a保持10，变量$ b保持20，然后是Perl算术运算符 -

Sr.No.	操作符和说明
1	+ ( Addition ) 在运算符的任一侧添加值 Example - $ a + $ b将给出30
2	- (Subtraction) 从左手操作数中减去右手操作数 Example - $ a - $ b将给出-10
3	* (Multiplication) 将运算符两侧的值相乘 Example - $ a * $ b将给出200
4	/ (Division) 用左手操作数除左手操作数 Example - $ b/$ a将给出2
5	% (Modulus) 用左手操作数除左手操作数并返回余数 Example - $ b％$ a将给出0
6	(Exponent) 对运算符执行指数（幂）计算 Example - $ a $ b将给出功率20的10

例子 (Example)

尝试以下示例以了解Perl中可用的所有算术运算符。将以下Perl程序复制并粘贴到test.pl文件中并执行该程序。

#!/usr/local/bin/perl
$a = 21;
$b = 10;
print "Value of \$a = $a and value of \$b = $b\n";
$c = $a + $b;
print 'Value of $a + $b = ' . $c . "\n";
$c = $a - $b;
print 'Value of $a - $b = ' . $c . "\n";
$c = $a * $b;
print 'Value of $a * $b = ' . $c . "\n";
$c = $a/$b;
print 'Value of $a/$b = ' . $c . "\n";
$c = $a % $b;
print 'Value of $a % $b = ' . $c. "\n";
$a = 2;
$b = 4;
$c = $a ** $b;
print 'Value of $a ** $b = ' . $c . "\n";

执行上述代码时，会产生以下结果 -

Value of $a = 21 and value of $b = 10
Value of $a + $b = 31
Value of $a - $b = 11
Value of $a * $b = 210
Value of $a/$b = 2.1
Value of $a % $b = 1
Value of $a ** $b = 16