C Java Python gcc -g hello_world.c javac -g HelloWorld.java

method 1:

import pdb

pdb.set_trace()

python hello_world.py

method 2:

python -m pdb hello_world.py

gdb ./a.out jdb Helloworld same with compiler

break 18(line number

you want to set break)

break at print()

break in 18 

break run run  no start exection command continue continue continue step step step print your_variable_name print/dump your_variable_name p your_variable_name info locals locals

locals() (priority use, it will not print extra info)

globals()

dir()

eval()

next next next list list list quit quit quit

languge:
compiler:
execute program:
set breakpoint:
start execution:
continue execution:
step execution:
print variable:
show local variable:
nextline:
show code:
end execution: