shell中判斷一個參數是否為整型

判斷參數是否為整型
#!/bin/bash</p><p>function IntTest()<br />{<br /> for arg<br /> do<br /> #算術運算子，當參數為整型數字時，執行失敗<br /> (( $arg )) 2>/dev/null #屏蔽出錯資訊<br /> if [ $? = 0 ]<br /> then<br /> echo "$arg" is an integer<br /> else<br /> echo "$arg" is not an integer<br /> fi<br /> done<br />}<br />IntTest -100 1234 22222222222222222 0765 0x10a +100 /<br /> 0xaadg assd 1.00 200.0 2a70 0.00

執行結果：
-100 is an integer
1234 is an integer
22222222222222222 is an integer
0765 is an integer
0x10a is an integer
+100 is an integer
0xaadg is not an integer
assd is not an integer
1.00 is not an integer
200.0 is not an integer
2a70 is not an integer
0.00 is not an integer