BASIC vs Learn Fortran | FortranPad

BASIC: THE FEELING OF THE GOOD OLD TIMES ! 10 INPUT A 20 B = SIN(A) 30 PRINT "ANSWER: ", B 40 END BASIC USER'S GUIDE: • PRINT 10 PRINT "HELLO WORLD !" 20 END • INPUT 10 INPUT “A=”, A 20 PRINT A 30 END • IF...THEN... Number Comparison: 10 INPUT A 20 IF A＞90 THEN B=“A” 30 PRINT B 40 END Conditional Operators: ＞ greater than ＜ less than ＞= greater than or equal to =＞ equal to or greater than ＜= less than or equal to =＜ equal to or less than = equal to == equal to ＜＞ not equal to != not equal to THEN can be followed by GOTO, GOSUB, INPUT, PRINT. String Comparison: 10 INPUT A 20 IF A=“TOM” THEN PRINT “BOY” 30 END Conditional Operators: = is == is ＜＞ is not != is not • FOR...NEXT... 10 FOR I=1 TO 4 STEP 2 20 PRINT “HELLO”, I 30 NEXT I 40 END STEP specifies the counter increment for each loop. If STEP doesn’t exit, the default increment is 1. FOR...NEXT... loop can be nested. 10 FOR I=1 TO 5 20 FOR J=1 TO 4 30 PRINT I, J 40 NEXT J 50 NEXT I 60 END • GOTO 10 ... 20 ... 30 ... 40 GOTO 10 50 ... • GOSUB 10 PRINT “H” 20 GOSUB 100 30 PRINT “L” 40 END 100 PRINT “A” 110 RETURN • SOUND 10 SOUND C, M, 0.5 The line 10 plays Middle C piano note for 0.5 seconds. Note: C, C#, D, D#, E, F, F#, G, G#, A, A#, B Pitch Range: L (low), M (middle), H (high) Lasting Time: specifies how long a note lasts. C, D, E, F, G, A, B can also be labeled as 1, 2, 3, 4, 5, 6, 7. (C# as 1#). • TEXT 10 TEXT “HELLO”, x, y, size (x,y): position of the string “HELLO”. • CIRCLE 10 CIRCLE x, y, radius (x,y): the center of the circle. • RECTANGLE 10 RECT x, y, width, height (x,y): top-left point of the rectangle. • LINE 10 LINE x1, y1, x2, y2 (x1,y1): the starting point of the line. (x2,y2): the ending point of the line. • POINT 10 POINT x, y (x,y): the position of the point. • CLR: clear the edit window. • CLS: clear the graph window. • DELAY 10 DELAY 0.5 0.5:lasting time in seconds This function is used to suspend execution of a program for a particular time. • CURVE 10 CURVE x, y, radius, 0, PI 0: starting angle PI: ending angle The curve draws clockwise with center (x,y). • Mathematical Functions: SIN(X), COS(X), TAN(X), COT(X), ASIN(X), ACOS(X), ATAN(X), SINH(X), COSH(X), TANH(X), ASINH(X), ACOSH(X), ATANH(X). SQR(X): square root of x. ABS(X): absolute value of x. FCT(X): x factorial. LOG(X): natural logarithm of x. LOG10(X): base-10 logarithm of x. LOG2(X) :base-2 logarithm of x. EXP(X): base-e exponential of x. ERF(X): the error function of x. ERFC(X): the complementary error function of x. ROUND(X) :integral nearest to x. CEIL(X): the smallest integral that is not less than x. FLOOR(X): the largest integral that is not greater than x. TGAMMA(X): the gamma function of x. LGAMMA(X): the natural logarithm of the absolute value of the gamma function of x. • Reserved Variables: INKEY : once a key is pressed, the value of INKEY changes. RND : a random number. PI : π • Some Tips: 1. Undo & Redo typing on iPhone with a shake. 2. Copy an Emoji or some character from other places (like Notes), then paste them on the edit window. 3. Exponentiation is expressed as X^Y.

Learn Fortran Programming Learn Fortran programming step by step with structured lessons, practical coding examples, quizzes, and tools designed to support your learning journey. Whether you're exploring Fortran for the first time or reviewing programming fundamentals, Learn Fortran provides an organized way to study important concepts, follow your progress, and practice coding. **EXPLORE FORTRAN PROGRAMMING** Start with an introduction to Fortran and build your understanding through clearly organized chapters and lessons. Explore topics featured in the app, including: - Overview of Fortran Programming - History and Evolution of Fortran - Importance of Fortran in Scientific Computing - Fortran Standards (77, 90, 95, 2003, 2008, 2018) - Features and Applications of Fortran - Setting Up Fortran Compiler (GFortran, Intel Fortran) - Writing Your First Fortran Program - Fortran Development Environment - Variables and Data Types - Operators and Expressions - Conditional Statements **STRUCTURED LESSONS** Explore programming concepts through organized chapters and individual lessons. View lesson progress, reading time, and quiz information as you move through the learning material. Continue reading lessons and keep track of completed topics. **PRACTICE WITH QUIZZES** Review your understanding with quizzes associated with the learning content. Use quiz questions to revisit programming concepts and reinforce what you've studied. **WRITE AND PRACTICE CODE** Explore the built-in Code Editor to practice programming. The editor includes coding examples, a workspace, and options to write and run code. The interface also displays programming language options, including Dart, Python, JavaScript, and C++. **SEARCH LESSONS AND TOPICS** Find learning content using the built-in search feature. Search lessons, browse categories, discover popular topics, and explore relevant learning material without manually navigating every chapter. **TRACK YOUR LEARNING PROGRESS** Stay informed about your progress with a dedicated learning dashboard. View completed lessons, chapter totals, quiz counts, completion percentages, and daily learning streaks. See which lessons are completed, in progress, or not yet started. **BUILD A DAILY LEARNING HABIT** Create a personalized learning schedule to support consistent study. Choose your preferred study time, select a study duration, set repeat days, and enable reminders to help maintain your routine. **TAKE NOTES AND SAVE LESSONS** Keep important information organized while learning. Use the note-taking feature to record useful points and revisit bookmarked lessons when needed. **EXPLORE COMMUNITY HELP** Access community questions, answers, and shared solutions. Browse programming topics, explore popular questions, and discover practical discussions related to coding. **PERSONALIZE YOUR EXPERIENCE** Adjust learning preferences through the Settings section. Explore options for app appearance, text size, language preferences, notifications, and learning schedules. **LEARN AT YOUR OWN PACE** Learn Fortran combines structured educational content with practical learning tools in one application. Read lessons, explore Fortran concepts, practice coding, review quizzes, track progress, and develop a consistent study routine. Start exploring Fortran programming and continue building your knowledge, one lesson at a time.