String concatenation in C joins two strings end-to-end into a single result. The standard library provides strcat() for this, but writing it manually teaches how C strings work: they are null-terminated char arrays, and concatenation means walking to the end of the destination string then copying source characters one by one until the null terminator. …
A prime number program in C checks whether a given integer is prime — divisible only by 1 and itself. Numbers like 2, 3, 5, 7, 11, and 13 are prime; 4, 6, 9, and 12 are not. This page covers two approaches: a basic trial division and an optimized version that skips even numbers, …
C program to check whether a given 5 digit number is palindrome or not. Palindromic number is a number that remains same, when it is reversed or can be read in the same way in either direction.Example:12321, 23132… Read more about C Programming Language . Read more Similar C ProgramsLearn C ProgrammingNumber System You can …
A leap year has 366 days instead of 365, with February 29 as the extra day. The Gregorian calendar uses a four-part rule to decide whether a year is a leap year. This rule is one of the most commonly tested C interview questions because it requires a compound conditional with exactly the right operator …
The Fibonacci sequence starts with 0 and 1; each subsequent term is the sum of the two that precede it: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, … This program generates the first n terms by storing them in an array, then printing the full sequence. Using an array — rather than …
Decimal to binary conversion in C uses the repeated-division-by-2 algorithm: divide the number by 2, record the remainder (0 or 1), then divide again until the quotient reaches 0. Reading the remainders from bottom to top gives the binary equivalent. This conversion is foundational for understanding how computers store integers — every value you work …