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  • C Programming
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  1. Arrays and Structs
  • Course Home
  • Getting Started
    • C's "Hello, World!" Explained Line by Line (for R & Python Users)
    • How to Test a Small C Snippet Quickly
  • Variables and Data Types
    • Declaring Multiple Variables in One Line in C
    • float vs double in C: Precision, Memory, and When to Use Which
  • Operators and Input
    • Pre-Increment vs Post-Increment in C: ++i vs i++
    • Checking User Input in C: Is It Really a Number?
  • Making Decisions
    • Nested if in C, Explained with Real-Life Examples
    • Shortcut Ways to Write if in C: the Ternary Operator and More
    • The switch Statement in C: Syntax, break, Fall-Through and Examples
  • Loops
    • The do-while Loop in C: Run First, Check After
    • Why Use break in a while Loop If the Condition Already Stops It?
    • Printing a Comma-Separated List in C (No Trailing Comma, Clean Line Breaks)
    • 5 while Loop Practice Problems in C (with Hints and Solutions)
    • 5 for Loop Practice Problems in C (with Hints and Solutions)
    • 5 Nested for Loop Practice Problems in C (with Hints and Solutions)
  • Arrays and Structs
    • How to Save Loop Results in an Array in C
    • Structs in C: Grouping Related Data (with Python and R Comparisons)
  • Random Numbers
    • srand(time(NULL)) in C: Why Random Numbers Repeat and How to Seed Them
    • Tossing a Die in C Until We Get a 6

Arrays and Structs

Store many values, and group related ones.
6.1How to Save Loop Results in an Array in CDeclare a fixed-size array, fill it with a for loop using the loop index, and grow it with malloc() and realloc() when the number of values is not known in advance.Code5 min6.2Structs in C: Grouping Related Data (with Python and R Comparisons)How C structs group different types into one unit: student records, arrays of structs, points, linked-list nodes, typedef, ->, padding, and how structs compare with Python dicts and R lists.Reading10 min
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5 Nested for Loop Practice Problems in C (with Hints and Solutions)
How to Save Loop Results in an Array in C