Bash 숫자 비교

Bash 비교문

Bash 숫자 비교

1 같다

if [ $A = $B ]; then echo YES; else echo NO; fi

if [ $A -eq $B ]; then echo YES; else echo NO; fi

[root@zetawiki ~]# A=2; B=2; if [ $A = $B ]; then echo YES; else echo NO; fi
YES
[root@zetawiki ~]# A=2; B=3; if [ $A = $B ]; then echo YES; else echo NO; fi
NO

2 같지 않다

if [ $A -ne $B ]; then echo YES; else echo NO; fi

[root@zetawiki ~]# A=2; B=2; if [ $A -ne $B ]; then echo YES; else echo NO; fi
NO
[root@zetawiki ~]# A=2; B=3; if [ $A -ne $B ]; then echo YES; else echo NO; fi
YES

3 작다

if [ $A -lt $B ]; then echo YES; else echo NO; fi

[root@zetawiki ~]# A=2; B=1; if [ $A -lt $B ]; then echo YES; else echo NO; fi
NO
[root@zetawiki ~]# A=2; B=2; if [ $A -lt $B ]; then echo YES; else echo NO; fi
NO
[root@zetawiki ~]# A=2; B=3; if [ $A -lt $B ]; then echo YES; else echo NO; fi
YES

4 작거나 같다

if [ $A -le $B ]; then echo YES; else echo NO; fi

[root@zetawiki ~]# A=2; B=1; if [ $A -le $B ]; then echo YES; else echo NO; fi
NO
[root@zetawiki ~]# A=2; B=2; if [ $A -le $B ]; then echo YES; else echo NO; fi
YES
[root@zetawiki ~]# A=2; B=3; if [ $A -le $B ]; then echo YES; else echo NO; fi
YES

5 크다

if [ $A -gt $B ]; then echo YES; else echo NO; fi

[root@zetawiki ~]# A=2; B=1; if [ $A -gt $B ]; then echo YES; else echo NO; fi
YES
[root@zetawiki ~]# A=2; B=2; if [ $A -gt $B ]; then echo YES; else echo NO; fi
NO
[root@zetawiki ~]# A=2; B=3; if [ $A -gt $B ]; then echo YES; else echo NO; fi
NO

6 크거나 같다

if [ $A -ge $B ]; then echo YES; else echo NO; fi

[root@zetawiki ~]# A=2; B=1; if [ $A -ge $B ]; then echo YES; else echo NO; fi
YES
[root@zetawiki ~]# A=2; B=2; if [ $A -ge $B ]; then echo YES; else echo NO; fi
YES
[root@zetawiki ~]# A=2; B=3; if [ $A -ge $B ]; then echo YES; else echo NO; fi
NO

7 같이 보기

• 비교문
• if
• Bash 숫자 계산

8 참고

• http://tldp.org/LDP/abs/html/comparison-ops.html