Got Error When Uploading Sketch

Guys,

I'm New Bee in arduino. I purchased it from local shop in india . I was trying to put one simple blinking program but it was giving Usb Error which i resolved it . But now I'm getting this Error . Don't know what to Do Next should I Go for Bootloader(Please suggest Programmer Tool for Arduino Uno R3) OR is there any trick to resolve it Please Suggest

Please Find the Below Error Which i got when i was uploading

Flashing with command:/Users/itcrdblrlt032/.arduino-create/arduino/avrdude/6.3.0-arduino9/bin/avrdude -C/Users/itcrdblrlt032/.arduino-create/arduino/avrdude/6.3.0-arduino9/etc/avrdude.conf -patmega328p -carduino -P/dev/cu.usbmodem1421 -b115200 -D -Uflash:w:/var/folders/c8/5kp257s1323crtgbf4p5vbw80000gn/T/arduino-create-agent841153402/sketch_apr28a.hex:i

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f (probably m328p)

avrdude: reading input file "/var/folders/c8/5kp257s1323crtgbf4p5vbw80000gn/T/arduino-create-agent841153402/sketch_apr28a.hex"

avrdude: writing flash (444 bytes):

Writing | ################################################## | 100% 0.08s

avrdude: 444 bytes of flash written

avrdude: verifying flash memory against /var/folders/c8/5kp257s1323crtgbf4p5vbw80000gn/T/arduino-create-agent841153402/sketch_apr28a.hex:

avrdude: load data flash data from input file /var/folders/c8/5kp257s1323crtgbf4p5vbw80000gn/T/arduino-create-agent841153402/sketch_apr28a.hex:

avrdude: input file /var/folders/c8/5kp257s1323crtgbf4p5vbw80000gn/T/arduino-create-agent841153402/sketch_apr28a.hex contains 444 bytes

avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.07s

avrdude: verifying ...

avrdude: verification error, first mismatch at byte 0x0003

0x80 != 0x00

avrdude: verification error; content mismatch

avrdude done. Thank you.