Setting Static IP in Raspberry Pi

STATIC IP FOR ETHERNET IN RASPBERRY PI

STEP 1: 
Enter Command
"sudo nano /etc/network/interfaces"

STEP 2: 

auto lo
iface eth0 inet static
address 10.201.100.85
netmask 255.255.0.0
gateway 10.201.137.15
nameserver 8.8.8.8

STEP 3: 
Restart Raspberry Pi.

STATIC IP FOR WIFI IN RASPBERRY PI

STEP 1: 
Enter Command
"sudo nano /etc/network/interfaces"

STEP 2:

allow-hotplug wlan0
iface wlan0 inet static
wireless-essid Tron
address 192.168.5.5
netmask 255.255.255.0

STEP 3: 
Restart Raspberry Pi.

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To Run a Program in Startup of Raspberry Pi