How to Concatenate Two Strings in C - Step by Step Examples

How to Concatenate Two Strings in C ?

Answer

To concatenate two strings in C, you can use the `strcat()` function.


✐ Examples

1 Concatenate "Hello" and "World"

In this example,

  1. We define two character arrays named str1 and str2 with values "Hello" and "World" respectively.
  2. We then concatenate str2 to str1 using the `strcat()` function.
  3. Finally, we print the concatenated string str1 to the console.

C Program

#include <stdio.h>
#include <string.h>

int main() {
    char str1[20] = "Hello";
    char str2[] = "World";
    strcat(str1, str2);
    printf("%s", str1);
    return 0;
}

Output

HelloWorld

Summary

In this tutorial, we learned How to Concatenate Two Strings in C language with well detailed examples.


More C Strings Tutorials

  1. How to Create an Empty String in C ?
  2. How to get Length of String in C ?
  3. How to get Character at Specific Index in String in C ?
  4. How to get First Character in String in C ?
  5. How to get Last Character in String in C ?
  6. How to get First N Characters in String in C ?
  7. How to get Last N Characters in String in C ?
  8. How to get Substring after Specific Character in C ?
  9. How to get Substring before Specific Character in C ?
  10. How to get Substring between two Specific Characters in C ?
  11. How to get Substring from Specific Index to End in C ?
  12. How to Iterate over Characters in String in C ?
  13. How to Iterate over Words in String in C ?
  14. How to Check if String is Empty in C ?
  15. How to Check if String contains only Alphabets in C ?
  16. How to Check if String contains only Alphabets and Numbers in C ?
  17. How to Check if String contains only Numeric Digits in C ?
  18. How to Check if a String contains given Substring in C ?
  19. How to Check if String contains specific Character in C ?
  20. How to Check if String starts with Specific Prefix in C ?
  21. How to Check if String ends with Specific Suffix in C ?
  22. How to Append a String to another String in C ?
  23. How to Append a Character to beginning of a String in C ?
  24. How to Append a Character to end of a String in C ?
  25. How to Concatenate Two Strings in C ?
  26. How to Repeat a String N Times in C ?
  27. How to Insert Character at Specific Index in String in C ?
  28. How to Replace a Substring in String in C ?
  29. How to Replace Character at Specific Index in String in C ?
  30. How to Replace All Occurrences of a Substring in a String in C ?
  31. How to Replace a Substring in a String using Regular Expression in C ?
  32. How to Split a String in C ?
  33. How to Split a String by New Line in C ?
  34. How to Split a String by Comma in C ?
  35. How to Sort Characters in String in C ?
  36. How to convert String to Lowercase in C ?
  37. How to convert String to Uppercase in C ?
  38. How to Trim a String in C ?
  39. How to convert First Character in String to Uppercase in C ?
  40. How to Reverse a String in C ?
  41. How to Remove Character at specific Index in a String in C ?
  42. How to Remove First Character in a String in C ?
  43. How to Remove Last Character in a String in C ?
  44. How to Remove first N Characters in a String in C ?
  45. How to Remove last N Characters in a String in C ?
  46. How to Remove specific Substring in C ?
  47. How to Remove specific Character from a String in C ?
  48. How to Remove All Whitespace Characters from a String in C ?
  49. How to Remove Special Characters from a String in C ?
  50. How to keep only Alphabets in a String in C ?
  51. How to Convert Integer to String in C ?
  52. How to Convert String to Integer in C ?
  53. How to convert String to Float in C ?
  54. How to convert Float to String in C ?
  55. How to check if Two Strings are Equal in C ?
  56. How to check if Two Strings are Equal ignoring case in C ?
  57. How to Compare Two Strings in C ?
  58. How to find the Characters in the First String that are not Present in the Second String in C ?
  59. How to find the Index of Substring in C ?
  60. How to find the Index of Last Occurrence of Substring in C ?
  61. How to find the Indices of All Occurrences of Substring in C ?
  62. How to get all the possible Substrings of a String in C ?
  63. How to get all the possible K length Substrings in a String in C ?