Conditionals

Programming basics

A conditional statement evaluates an expression and executes instructions depending on the outcome of the evaluation. Most of the time, the evaluation is boolean (true or false).

<syntaxhighlight lang="PHP" >

 if player_guess == secret_number:
       print("You won in " + str(guess) + " guesses!")
      
       play_again = raw_input("Do you want to play again? ")
       if play_again == "y" or play_again == "Y" or play_again == "yes":
           guess = 0
           game = game + 1
       break
   elif player_guess < secret_number:
       print("That is a bit to low")
   elif player_guess > secret_number:
       print("That is a bit to high")

</syntaxhilight>

A video

This video references the C programming language and scratch, but the ideas about conditionals are excellent. In the case of conditionals, PHP and C share similar syntax (but not exact).

Standards

• Define the terms: variable, constant, operator, object.

See Also

• Conditionals in php

A unit of abstract mathematical system subject to the laws of arithmetic.

Give the precise meaning of a word, phrase, concept or physical quantity.