SDD Predefined Functions

SDD Predefined Functions

• 1.
  Predefined Functions
• 2.
  Predefined Functions  Apredefined function is a subroutine included in a programming language that carries out a specific task.  This can save the programmer time because they don’t have to write the code.
• 3.
  Predefined Functions Examples: ROUND -takes a number and returns the nearest whole number, or to a given number of decimal places. ROUND(41.25) would return 41 ROUND(41.2563, 2) would return 41.26
• 4.
  Predefined Functions Examples: LEN orLENGTH - returns the length of a specified string LEN(“Hello World”) would return 11
• 5.
  Predefined Functions Examples: RANDOM -returns a random number RANDOM(1, 10) would return a random number between 1 and 10
• 6.
  Parameters Notice that afterthe name of each function we add some information This is known as a parameter We can pass one or more parameters to a function
• 7.
  Parameters LEN(“Hello World”) ROUND(41.2563,2) Parameters RANDOM(1, 10)