Source Code. Every computer program is written in a programming language, such as Java, C/C++, or Perl. These programs include anywhere from a few lines to millions of lines of text, called source code. Source code, often referred to as simply the source of a program, contains variable declarations, instructions, functions, loops, and other statements that tell the program how to function. Programmers may also add comments to their source code that explain sections of the code.
1 Pain of many kinds seems to be caused or made worse by stress. 2  Gastrointestinal (gas-tro-in-TES-ti-nal) problems, such as heart-burn, stomach pain, and diarrhea. 3  Insomnia, or difficulty sleeping. 4  Substance abuse, including smoking, drug addiction, and heavy drinking of alcohol.
A lot of things can cause stress. You may feel stress when you go on a job interview, take a test, or run a race. These kinds of short-term stress are normal. Long-term (chronic) stress is caused by stressful situations or events that last over a long period of time, like problems at work or conflicts in your family. Over time, chronic stress can lead to severe health problems.