shell 与 awk if,for,while 比较

If

If [ $1 �Cle 100 ];then echo ture;else echo false;fi

If [[ $1<=100 ]];then echo ture;else echo false;fi

Awk ‘BEGIN{test=100;if (test>90){print test;}}’

 

For:

For I in (seq 100);do echo $i;done

For ((i=1;i<=100;i++));do echo $i;done

For ((i=1;i<=100;i++));do echo $1;done

Awk ‘BEGIN{for (x=1;x<=100;x=x+1) {print x;}}’ filename

 

While:

i=1;while [ $i �Cle 5 ] ； do echo $i;((i= +1));done

awk ‘BEGIN{test=100;while (i<test){i++ ;print i}}’

awk ‘BEGIN{test=100;i=1;do {printf test “\t\n”;i++} while (i<test){printf “done”;}}’