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Basic
Switch Case
Goto
Operators
if Statement
Nested if
While Loop
For Loop
Patterns
Array
2D Array
String Function Example
Pointers
Recursion Function
Structure
Excersises
Others



C Program to Remove All Spaces from a String


Write a C program to remove all spaces from a string.

  • Reads characters from the user one by one until newline (\n) is encountered.
  • Stores the null terminator (\0) to properly mark the end of the original string.
  • Copies only non-space characters from the original string into a new string.
  • Prints the final string without any spaces using the result array.
Example : pgm.c 
#include <stdio.h>

int main() {
    char str[100], result[100];
    int i = 0, j = 0;

    printf("Enter a string: ");
    while ((str[i] = getchar()) != '\n') {
        i++;
    }
    str[i] = '\0';

    // Remove spaces
    for (i = 0; str[i] != '\0'; i++) {
        if (str[i] != ' ') {
            result[j] = str[i];
            j++;
        }
    }
    result[j] = '\0';

    printf("String without spaces: %s\n", result);

    return 0;
}

Output :

Enter a string: Hello World
String without spaces: HelloWorld