Programming For Problem Solving Notes Pdf Apr 2026

() → ++ -- → * / % → + - → < > <= >= → == != → && → || → = 5. Conditional Statements if-else:

| Type | Size (approx) | Format Specifier | |------|--------------|------------------| | int | 2/4 bytes | %d | | float| 4 bytes | %f | | char | 1 byte | %c | | double| 8 bytes | %lf |

int arr[5] = 1,2,3,4,5; arr[0] = 10; // index 0-based

char str[] = "Hello"; // null terminated: 'H','e','l','l','o','\0' strlen() , strcpy() , strcat() , strcmp() , strchr() 11. Structures & Unions Structure: groups different data types. programming for problem solving notes pdf

Machine (1GL) → Assembly (2GL) → High-level (3GL: C, Python) → 4GL, 5GL.

switch(expression) case 1: ... break; case 2: ... break; default: ... break;

// variable declarations // statements return 0; () → ++ -- → * / %

if (condition) // code; else if (cond2) // code; else // code;

Source code (.c) → Preprocessor → Compiler → Object code → Linker → Executable (.exe)

#include <stdio.h> // preprocessor directive int main() // main function Machine (1GL) → Assembly (2GL) → High-level (3GL:

struct Student int roll; char name[20]; float marks; ; struct Student s1 = 1, "John", 85.5; same memory shared among members (size = largest member). 12. File Handling Basic operations: Open, Read, Write, Close.

return_type function_name(parameters) // body return value;

for loop: for(init; condition; update) while loop: while(condition) do-while loop: do while(condition); → executes at least once.