getIP() {
    ipconfig | grep "IPv4 Address" | sort | head -1 | cut -d ":" -f 2 \
        | sed -e "s/ *\\([0-9.]*\\).*/\\1/" 
}


#
# the following four commands should print IP address 4 times
#
getIP
+ getIP
+ ipconfig
+ grep 'IPv4 Address'
+ sort
+ head -1
+ cut -d : -f 2
+ sed -e 's/ *\([0-9.]*\).*/\1/'
10.4.22.98

print $(getIP)
+ getIP
+ ipconfig
+ grep 'IPv4 Address'
+ sort
+ head -1
+ cut -d : -f 2
+ sed -e 's/ *\([0-9.]*\).*/\1/'
+ print $'\r' Windows IP $'Configuration\r' $'\r' $'\r' Ethernet adapter Local Area Connection $'MSLPBK:\r' $'\r' Connection-specific DNS Suffix . : $'\r' Link-local IPv6 Address . . . . . : $'fe80::594e:2112:6519:c2ef%33\r' IPv4 Address. . . . . . . . . . . : $'192.168.2.10\r' Subnet Mask . . . . . . . . . . . : $'255.255.255.0\r' Default Gateway . . . . . . . . . : $'\r' $'\r' Wireless LAN adapter Wireless Network Connection $'2:\r' $'\r' Media State . . . . . . . . . . . : Media $'disconnected\r' Connection-specific DNS Suffix . : $'\r' $'\r' Wireless LAN adapter Wireless Network $'Connection:\r' $'\r' Media State . . . . . . . . . . . : Media $'disconnected\r' Connection-specific DNS Suffix . : $'\r' $'\r' Ethernet adapter Local Area $'Connection:\r' $'\r' Connection-specific DNS Suffix . : $'\r' Link-local IPv6 Address . . . . . : $'fe80::a9db:853c:2ef5:862e%11\r' IPv4 Address. . . . . . . . . . . : $'10.4.22.98\r' Subnet Mask . . . . . . . . . . . : $'255.255.252.0\r' Default Gateway . . . . . . . . . : $'10.4.20.1\r' $'\r' Ethernet adapter VirtualBox Host-Only $'Network:\r' $'\r' Connection-specific DNS Suffix . : $'\r' Link-local IPv6 Address . . . . . : $'fe80::fc89:b59b:7fc0:eace%43\r' IPv4 Address. . . . . . . . . . . : $'192.168.56.1\r' Subnet Mask . . . . . . . . . . . : $'255.255.0.0\r' Default Gateway . . . . . . . . . : $'\r' $'\r' Tunnel adapter Teredo Tunneling $'Pseudo-Interface:\r' $'\r' Media State . . . . . . . . . . . : Media $'disconnected\r' Connection-specific DNS Suffix . : $'\r'

 Windows IP Configuration
 
 
 Ethernet adapter Local Area Connection MSLPBK:
 
 Connection-specific DNS Suffix . : 
 Link-local IPv6 Address . . . . . : fe80::594e:2112:6519:c2ef%33
 IPv4 Address. . . . . . . . . . . : 192.168.2.10
 Subnet Mask . . . . . . . . . . . : 255.255.255.0
 Default Gateway . . . . . . . . . : 
 
 Wireless LAN adapter Wireless Network Connection 2:
 
 Media State . . . . . . . . . . . : Media disconnected
 Connection-specific DNS Suffix . : 
 
 Wireless LAN adapter Wireless Network Connection:
 
 Media State . . . . . . . . . . . : Media disconnected
 Connection-specific DNS Suffix . : 
 
 Ethernet adapter Local Area Connection:
 
 Connection-specific DNS Suffix . : 
 Link-local IPv6 Address . . . . . : fe80::a9db:853c:2ef5:862e%11
 IPv4 Address. . . . . . . . . . . : 10.4.22.98
 Subnet Mask . . . . . . . . . . . : 255.255.252.0
 Default Gateway . . . . . . . . . : 10.4.20.1
 
 Ethernet adapter VirtualBox Host-Only Network:
 
 Connection-specific DNS Suffix . : 
 Link-local IPv6 Address . . . . . : fe80::fc89:b59b:7fc0:eace%43
 IPv4 Address. . . . . . . . . . . : 192.168.56.1
 Subnet Mask . . . . . . . . . . . : 255.255.0.0
 Default Gateway . . . . . . . . . : 
 
 Tunnel adapter Teredo Tunneling Pseudo-Interface:
 
 Media State . . . . . . . . . . . : Media disconnected
 Connection-specific DNS Suffix . : 

ipconfig | grep "IPv4 Address" | sort | head -1 | cut -d ":" -f 2 \
    | sed -e "s/ *\\([0-9.]*\\).*/\\1/"
+ ipconfig
+ grep 'IPv4 Address'
+ sort
+ head -1
+ cut -d : -f 2
+ sed -e 's/ *\([0-9.]*\).*/\1/'
10.4.22.98

print $(ipconfig | grep "IPv4 Address" | sort | head -1 | cut -d ":" -f 2 \
    | sed -e "s/ *\\([0-9.]*\\).*/\\1/")
+ ipconfig
+ grep 'IPv4 Address'
+ sort
+ head -1
+ cut -d : -f 2
+ sed -e 's/ *\([0-9.]*\).*/\1/'
+ print $'\r' Windows IP $'Configuration\r' $'\r' $'\r' Ethernet adapter Local Area Connection $'MSLPBK:\r' $'\r' Connection-specific DNS Suffix . : $'\r' Link-local IPv6 Address . . . . . : $'fe80::594e:2112:6519:c2ef%33\r' IPv4 Address. . . . . . . . . . . : $'192.168.2.10\r' Subnet Mask . . . . . . . . . . . : $'255.255.255.0\r' Default Gateway . . . . . . . . . : $'\r' $'\r' Wireless LAN adapter Wireless Network Connection $'2:\r' $'\r' Media State . . . . . . . . . . . : Media $'disconnected\r' Connection-specific DNS Suffix . : $'\r' $'\r' Wireless LAN adapter Wireless Network $'Connection:\r' $'\r' Media State . . . . . . . . . . . : Media $'disconnected\r' Connection-specific DNS Suffix . : $'\r' $'\r' Ethernet adapter Local Area $'Connection:\r' $'\r' Connection-specific DNS Suffix . : $'\r' Link-local IPv6 Address . . . . . : $'fe80::a9db:853c:2ef5:862e%11\r' IPv4 Address. . . . . . . . . . . : $'10.4.22.98\r' Subnet Mask . . . . . . . . . . . : $'255.255.252.0\r' Default Gateway . . . . . . . . . : $'10.4.20.1\r' $'\r' Ethernet adapter VirtualBox Host-Only $'Network:\r' $'\r' Connection-specific DNS Suffix . : $'\r' Link-local IPv6 Address . . . . . : $'fe80::fc89:b59b:7fc0:eace%43\r' IPv4 Address. . . . . . . . . . . : $'192.168.56.1\r' Subnet Mask . . . . . . . . . . . : $'255.255.0.0\r' Default Gateway . . . . . . . . . : $'\r' $'\r' Tunnel adapter Teredo Tunneling $'Pseudo-Interface:\r' $'\r' Media State . . . . . . . . . . . : Media $'disconnected\r' Connection-specific DNS Suffix . : $'\r'

 Windows IP Configuration
 
 
 Ethernet adapter Local Area Connection MSLPBK:
 
 Connection-specific DNS Suffix . : 
 Link-local IPv6 Address . . . . . : fe80::594e:2112:6519:c2ef%33
 IPv4 Address. . . . . . . . . . . : 192.168.2.10
 Subnet Mask . . . . . . . . . . . : 255.255.255.0
 Default Gateway . . . . . . . . . : 
 
 Wireless LAN adapter Wireless Network Connection 2:
 
 Media State . . . . . . . . . . . : Media disconnected
 Connection-specific DNS Suffix . : 
 
 Wireless LAN adapter Wireless Network Connection:
 
 Media State . . . . . . . . . . . : Media disconnected
 Connection-specific DNS Suffix . : 
 
 Ethernet adapter Local Area Connection:
 
 Connection-specific DNS Suffix . : 
 Link-local IPv6 Address . . . . . : fe80::a9db:853c:2ef5:862e%11
 IPv4 Address. . . . . . . . . . . : 10.4.22.98
 Subnet Mask . . . . . . . . . . . : 255.255.252.0
 Default Gateway . . . . . . . . . : 10.4.20.1
 
 Ethernet adapter VirtualBox Host-Only Network:
 
 Connection-specific DNS Suffix . : 
 Link-local IPv6 Address . . . . . : fe80::fc89:b59b:7fc0:eace%43
 IPv4 Address. . . . . . . . . . . : 192.168.56.1
 Subnet Mask . . . . . . . . . . . : 255.255.0.0
 Default Gateway . . . . . . . . . : 
 
 Tunnel adapter Teredo Tunneling Pseudo-Interface:
 
 Media State . . . . . . . . . . . : Media disconnected
 Connection-specific DNS Suffix . : 

exit
+ exit